问题
Linda, together with her parents, ______up the mess in 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
B:are cleaning
C:has cleaned
D:have cleaned
正确答案是：
同类题型
Look! There is ________ cat in the tree.
Tony, could you give me a hand?—Wait a minute.I ______.
This picture is quite old, we can still see it was drawn in century.
Last night I called him. ______ 8:30, but he was not in. [ ]
I ______ music that I can dance to ______ the one that I can sing along with.[ ]