问题

I _____without your help. I do appreciate it . —–You are welcome.

A:can’t manage
B:couldn’t manage
C:can’t have managed
D:couldn’t have managed

正确答案是：

同类题型

.Mathematics ______ the language ofscience.

下列各句中没有语病的一句是（）

____ Betty this morning?— Not yet, but she is sure to be here before noon

The information can ____ on the Internet.

Would you like ______ ， sir— No， thanks. I have had much.