In some countries citizens are to vote and if they don’t they get fined.A. demandedB. su

问题补充：

In some countries citizens are to vote, and if they don’t they get fined.

A. demanded

B. suggested

C. prevented

D. required

答案：

A. demanded

B. suggested

C. prevented

(答案→)D. required

解析：考察动词词义辨析。A要求B建议C阻止D要求；本题ABC三项的宾语后面不能接不定式做补足语。只有require可以使用require sb to do sth。句意：在一些国家里，只要他们没有被惩罚，公民们都被要求投票，故D正确。