问题

It is rather difficult to make friends with her, but her friendship, _______, is truer than any other’s.

A:while gaining
B:after gaining
C:when to gain
D:once gained

正确答案是：

同类题型

The boy often forgets hishomework. So his teacher is angry

Thank you for ________ the class trip. 　

Could I have a word with you, mum? — Oh, dear, if you _____. [ ]

I’m very ________ about expressing my opinions in public in case I may make mistakes.

A yellow background will make the black characters ________.