问题
I have no idea ______ it is that makes him puzzled
A:how
B:what
C: why
D:which
B:what
C: why
D:which
正确答案是：
同类题型
Another bridge _____ at the end of 2012over LiuYang River will benefit many people.
The fire fighters soon got the fire in the building
I expect everything will turn out as you wish.-_______.
Are these your pencils—Yes,____________.
He kept a little notebook, in which________ the names and addresses of his friends.[ ]