1. Now I can understand      …     

a. why did he leave early.                                   b. what was he talking about.

c. why he left his wife.                                         d. why did he make such a big mistake.

2. An envelope was waiting for me       …       I got home.

a. since                   b. while                 c. whenever                           d. when

3. At first he didn't want to give the lecture. But finally the teacher      …     him give it.

a. permitted           b. made                  c. allowed                              d. forced

4. Some of the people       …      by the police have been released recently.

a. catching             b. to catch             c. caught                                d. that are catching

5. He was behaving       …      at school today that he was sent home.

a. very badly         b.so badly             c. badly enough                   d. too badly

6. The       …        of the research is to try and find out more about the causes of the disease.

a. history                               b. observation                      c. purpose             d. emotion            

7.  I was stuck in the traffic for hours, which put me in a bad        …          .

a. occasion                            b. contact                             c. mood                 d. humor

8. I'm very       …         to have been involved in this project.

a. aware                                 b. proud                                                 c. firm                     d. confident

9. Can you give me a(n)         …       that the work will be completed by the end of the week?

a. material                              b. item                                    c. guarantee          d. location

10. We all      …       him to be German, but in fact he was Swiss.

a. supposed                          b. trapped                              c. survived            d. covered

11. Protecting the     …     and the fight against pollution of all kinds is now major concern in many countries.

a. excitement                         b. location                              c. distraction        d. environment

12. There's no room for more books; we have used up all the          …          space.

a. recyclable                          b. reasonable                        c. available            d. flexible

13. Did you notice the aftershocks       …      the cups on the table?

a. distract                               b. damage                              c. rattle                   d. ignore

14. As we get older, our bodies become less         …         at burning up calories.

a. efficient                              b. excellent                            c. creative              d. regular

15. He wasn't exactly pleased to see us; in fact he        …       to open the door.

a. refused                               b. recalled                              c. released             d. increased

On clear night, people have always looked up at the stars and     16       and wondered, "What is it like up there? Is anybody out there? Are we the only ones?"  We still don't know the answers to all these questions, although each space     17    takes us a little   18      to finding out. Now we know that the moon is not   19   of cheese and that there aren't little people on Mars. But someplace out there, there may be     20    . And maybe, just maybe, on clear night, they look out at the Earth and wonder, "what's it like down there? Is there anybody out there? Are we the only ones?"

16. a. plates                           b. planets                               c. plants                                 d. planes

17. a. hole                              b. step                                    c. travel                  d. vehicle

18. a. closer                           b. later                                    c. earlier                 d. upper

19. a. included                       b. made                                  c. consisted           d. designed

20. a. another                        b. others                                c. the other            d. other

The way you heat or cool your home has a big effect on the earth. But most people don't usually think about where their heat comes from. Yet nearly every type of energy source produces trash or adds pollution to the air.

Buildings have a big impact on the environment. They use more energy than any other economic category, including transportation and industry. Almost half of the energy that buildings use goes into heating and cooling.

A growing number of engineers and architects have been looking for new ways to make buildings less wasteful and kinder to the environment. Improvements have come in many forms, including better covering, windows, and construction materials. Architects are also realizing that the size, location, and positioning of a building affects how much energy it uses. Even the arrangement of buildings in a neighborhood makes a difference.

In the last 10 years, there has been a major movement toward what you'd call 'green' buildings. Such buildings are also described as environmentally friendly, or healthy.

21. From the passage we understand that most people ………………..  .

a. don't know how to heat or cool their house

b. look for ways to make buildings less wasteful

c. realize the size and location of the building

d. don't think about the source of energy they use

22. The underlined word 'they' in the second paragraph refers to …………    .

a. engineers                           b. transportation and industry           c. buildings                           d. people   

23. The underlined word 'including' in line 6 means ……     .

a. such as                              b. as                                                        c. instead of                          d. without

24. Architects are trying to ………   .

a. realize the size and location of the buildings

b. look for a different neighborhood

c. improve a major movement

d. design buildings that waste less energy

25. The 'green' buildings ……       .

a. will be our close friends

b. cause little damage to the environment

c. use more energy than any other economic category

d. produce trash or add pollution to the air