knock at/on 敲knock into 撞到某人身上knock down 撞倒knock out of 把…敲出knock over 撞倒knock off 停止工作，休息1) The boxer soon knocked his opponent ________ __.2) The office stuff knocks _________ ___ at six every day.3) Try knocking __________ ___ the window and see if there is anyone indoors.4) He was so absorbed in his book that he knocked __________ _____ the car parked there.

How did the man hurt his head（） A: He fell down from a ladder. B: A can of paint dropped on his head. C: He knocked his head against a window.

Melankomas's boxing style is that ______. A: he defends himself from the blows of the other boxer and avoids striking the opponent B: he strikes the opponent and quickly ends the match, and secures an easy victory for himself C: he goes for two straight days with his arms up, not once putting them down or resting. D: he would fight throughout the whole day, even in the summer

7. When he became a famous poet he was ________ his early thirties.

a person who opposes or fight against another; opponent; enemy a____