The foreign expert put forward a plan at yesterday’s meeting all the people present spok

问题补充：

The foreign expert put forward a plan at yesterday’s meeting, all the people present spoke highly of.

A. that

B. what

C. which

D. when

答案：

A. that

B. what

(答案→)C. which

D. when

解析：考查定语从句。在介词+关系代词引导的定语从句中，必须用which。结合下文介词of，可知选C。