—— Has Jack finished his homework yet?
—— I have no idea; he ___it this morning.
A.was doing | B.had been doing |
C.has done | D.did |
推荐套卷
—— Has Jack finished his homework yet?
—— I have no idea; he ___it this morning.
A.was doing | B.had been doing |
C.has done | D.did |