问题

________a certain doubt among the people as to the practical value of the project

A:what; when
B:that;which
C:what; which
D:which; that

正确答案是：

同类题型

Can I have snacks Sorry，we don’t have .

When you study the local map, you’ll find this town is ______ .

___________for his good skill, this doctor has a lot of visitors calling for help all the time.

, young man——–I have a toothache.

下列各句中，语言表达得体的一句是