问题

Why? Tom, your shirt is so dirty! — Mum, I ______ my storeroom downstairs
A:cleaned
B:have cleaned
C:was cleaning
D:have been cleaning
B:have cleaned
C:was cleaning
D:have been cleaning
正确答案是:
同类题型
The little time we have together we’ll try_____ wisely
.—I give upIt’s too hard—Really? I__________you could make it through
The situation in the country is ________, yet we are still concerned about its future.
This basket he sent me yesterday _______ many kinds of fruits, _______ apples and pears.