You ______ home if you are not willing to go out with us.
A. had better to stay
B. might stay as well
C. might as well stay
D. had better staying
查看答案
Which of the following most probably led to a decreased use of windmills in the U. S.
A. The advent of nuclear energy.
B. Increased environmental awareness.
C. The availability of inexpensive electricity in rural areas.
D. A long-term shift in wind currents.
The American public are divided in opinion about ______.
A. whether the use of guns should be restricted
B. how to ban guns altogether
C. how to reduce the crime rate
D. whether they should be allowed to own guns
According to the study by Thorpe, a chaffinch reared in isolation after its birth ______.
A. never sings
B. cannot learn songs from other species of birds
C. never sings as well as other chaffinches
D. sings the same song all the time
What gas does not pollute the air
A. Oxygen.
B. Hydrocarbons.
Carbon monoxide.
D. Nitrogen oxides.
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