Question

In the meeting, the professor expressed his thanks for the aid he _________ from his students.

A．received

B．was received

C．have received

D．had received

Answer 1

D

    
试题分析:考查动词时态。根据语境可知获得帮助是发生在动词expressed之前，表示过去的过去，所以用过去完成时，故答案选D。句意：在会议上，教授表达了他对学生们帮助的感激。