You must know _____ you’ve done.

A. wrong 　 B. a wrong　　 C. the wrong 　 D. wrongs

The foreigner tried his best, but he still couldn’t make his point ____ 　.

A. understand　  　 B. understanding 　 C. to understand 　      D. understood

____ you may be right , I can’t agree completely.

A. While       　　B. As      　　 C. If         　 D. Since

_____ matters much ___ the headmaster supports our activity.

A. It; whether B. what; whether C. as; that D. that; if

I am afraid I would have little influence over her________her mind was made up on any subject.

A．until 　　　　　 B．once

C．though 　　　　　　 D．unless

Darwin’s Origin of Species, probably ranking second only to the Bible, has ______ on Western thought.

A. taken immediate actions　　　　　 　B. had a great impact

C. left a deep impression　　　　　　 D. produced lots of pressure

–Are you a teacher?

--No, but I ________.

A. used to　　　 B. was used to　　 C. used to be　　 D. used to do

下列关于运动的分解的说法中不正确的是(　 )

A.初速度不为零的匀加速直线运动,可以分解成一个匀速直线运动与一个初速为零的匀加速直线运动

B.一个在平面上的曲线运动可以分解成两个直线运动

C.沿斜面向上的运动可以分解为一个水平方向的运动和一个竖直向上的运动

D.可以将斜向下速度为 9 m/s的运动分解成两个速度分别为3 m/s和5 m/s的匀速运动

----Oh, it’s you! I ___ you.

----I’ve just had my hair cut, and I’m wearing new glasses.

A. didn’t recognize　　　　 B. hadn’t recognized

C. haven’t recognized　　　 D. don’t recognize

His behavior at the party last night seemed rather______. Many of us were quite surprised.

　 A. out of practice　　 B. out of place　　 C. out of politeness　 D. out of pity