Question

She didn’t know__________she could express her ideas clearly when she was invited to speak at the meeting.

A．what

B．why

C．how

D．whether

Answer 1

C

试题分析：句意：当她被请去会议上发言时，她不知道她怎样表达清楚。what什么；why为什么；how怎样；whether是否。根据题意，故选C。