Students taking the course _____to finish their homework with the help of puters．
A.are encouraged
B.have encouraged
C.are encouraging
D.had been encouraged
网友回答
A解析考查被动语态。taking the course是现在分词答语作后置定语，Students和encourage是动宾关系，应该用被动语态，排除B、C；句中没出现过去的动作，不能用过去完成时。故选A。