___a new library____ in your school last year?
A. Is; built
B. Was; built
C. Does ;built
Did; built.
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Cotton ____in the southeast of China.
A. i s grown
B. are grown
C. grows
D. Grow
So far, the moon___ by man already.
A. is visited
B. will be visited
C. has been visited
D. was visited.
How many trees ___this year?
A. are planted
B. will plant
C. have been planted
D. planted.
A lot of things ___by people to save the little girl now.
A. are doing
B. are being done
C. has been done
D. will be done.
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