问题

It’s easy to make friends, but it’s difficult to keep the ________ longer.

A:go on
B:going
C:going on
D:about;

正确答案是：

同类题型

How often does the boy play sports?—__________

Many astudentthat mistake before.

Don’t always cry . I don’t think it ______.

nockedat the door—I’ve no idea.I just pretended nobody was at home, so I didn’t ask who ____ was.

Is there_____ beef in the fridge— No, there isn’t. There is ______ pork.