Students______ to do some voluntary work every year.

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问题 Students______ to do some voluntary work every year.

选项 A、were encouraged
B、are encouraged
C、encourage
D、encouraged

答案B

解析 encourage sb.to do sth.,意为“鼓励某人做某事”。students与encourage之间存在被动关系,需要被动语态;由时间状语every year可知,需用一般现在体。答案为B。
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