Sorry, Professor Smith. I didn’t finishthe assignment yesterday. –Oh, you _____ have done it as yesterdaywas the deadline.

Can you guess if they _______ to playbasketball with us— I think they’ll come if they _________free

Can Li Hua help me with my English? —I regret to tell you that her English is _____ yours. Why not ask others for help?

Here ______ two _______ of white socks for your son.

Not until he retired from teaching three years ago _______having a holiday abroad .