问题

Linda, together with her parents, ______up the messin the park at the moment. —It’s meaningful to be a volunteer. Let’s join them.

A: is cleaning
B: are cleaning
C:has cleaned
D: have cleaned

正确答案是：

同类题型

I won’t go to the concert because I______my ticket

, I think, and all the problems could be settled

Is this your computer game, Tom—Yes, it’s _______.

Lily’s books are newer than .

Mike replied, with a big smile, “Oh, you_______ to worry about them.”