These English songs __________ by the boys after class.
A. often sing
B. often sang
C. are often sung
D. are often sang
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It __________by Chinese people that crabs（螃蟹）with pumpkin
A. is believed; can't be eaten
B. is believed ;can't eat
C. believes ; can be eaten
D. believes ; can eat
The disabled should not__________by others.
A. be looked down
B. be looked
C. look down
D. be looked down upon
The visitors are _________by some kids now.
A. dancing around
B. dancing
C. danced
D. being danced around
My new pen________smoothly（流利地）.
A. write
B. is written
C. writes
D. written
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