New technology _____ to make sure the cars, taxis, buses and trains we use _____
题型：0103 月考题难度：来源：
| New technology _____ to make sure the cars, taxis, buses and trains we use _____ the air. |
A. is used; not to pollute
B. has used; is not polluted
C. is being used; do not pollute
D. has been used; not pollute |
答案
举一反三
— Flight MU257 _____. I must be off now.
— Have a nice trip. |
A. is being announced
B. has announced
C. was announcing
D. had been announced |
| Now the world"s attention _____ the stocking markets, as they have great influence in the world"s economy. |
A. is fixing on
B. has fixed on
C. is being fixed on
D. had been fixed on |
| This new method of teaching _____ for the time being in our school. It will be carried out all over the city. |
A. is experimenting
B. is experimented
C. is being experimented
D. has been experimented |
— Why haven"t you moved in yet?
— Oh, the apartment _____. |
A. is painted
B. has been painting
C. is being painted
D. has been painted |
| We can"t move in the new house now because it _____. |
A. has been painted
B. was painted
C. is being painted
D. is painted |
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