问题

That is __________ the problem lies.

A:how
B:when
C:where
D:what;

正确答案是：

同类题型

Mr. Wang, have you corrected the papers? — Yes, but I regretthat you didn’t pass it. [ ]

When first to the market, these products enjoy great success.

We all know that, __________, the situation will get worse.

Lei Feng always _____ othersfirst.

–—You look so tired Why not have a rest—–_________