问题

It would seem to be a general truth__________ nothing is as straightforward as it at first seems

A:that
B:when
C:what
D:if

正确答案是：

同类题型

To write a good article you must first yourideas very carefully

I ________ the bus at the stop when it began to rain hard.

Could you tell me — Certainly. In 20 minutes.

Are you satisfied with what shehas done — Not at all It couldn’t be _______

____the book if you are free, and you will learn a lot about how to study English