Question

【题目】How many trees ____ this year?

A. are planted B. will plant

C. have been planted D. planted

Answer 1

【答案】C

【解析】考查现在完成时的被动语态。今年已种了多少棵树？表示到现在为止已种了多少树。要用现在完成时。但树是被种，故用现在完成时的被动语态。故选C。