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

下列關(guān)于運(yùn)動(dòng)的分解的說法中不正確的是(　 )

A.初速度不為零的勻加速直線運(yùn)動(dòng),可以分解成一個(gè)勻速直線運(yùn)動(dòng)與一個(gè)初速為零的勻加速直線運(yùn)動(dòng)

B.一個(gè)在平面上的曲線運(yùn)動(dòng)可以分解成兩個(gè)直線運(yùn)動(dòng)

C.沿斜面向上的運(yùn)動(dòng)可以分解為一個(gè)水平方向的運(yùn)動(dòng)和一個(gè)豎直向上的運(yùn)動(dòng)

D.可以將斜向下速度為 9 m/s的運(yùn)動(dòng)分解成兩個(gè)速度分別為3 m/s和5 m/s的勻速運(yùn)動(dòng)

----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