Simon improved his way of study. ________, he has made great progress.
I found a little boy________in the street corner.
We had a lot of fun________tennis.
—________you________on vacation? —I just stayed at home.
—Do you know who cleaned the blackboard,Tina? —Yes,John________. A.do B.does C.did
Lee________all night in order to watch the football match between France and Italy.