问题
选择题
Students taking the course _____to finish their homework with the help of computers．
A．are encouraged
B．have encouraged
C．are encouraging
D．had been encouraged
答案
答案：A
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。