_____ some teenagers don’t realize is _______ difficult life can be after they get

　 addicted to drugs.

　　 A. What?what a　 B. What? how　 　　 C. That?how　 D. That?what

A fish needs water and without water it will die ______.　　

　 A. so does a man 　 B. so will a man

　 C. so it is with a man 　 D. so is it with a man

Tom , you ______ leave all your clothes on the floor like this next time.

A．wouldn’t　　　　 B.mustn’t　　　　　　 C．needn’t　　 D．may not

Swimming alone ____ be ____ dangerous. Do be careful.

　 A. need, highly　　 B. may, high　　 C. can; highly　 D. can; high

—Robert is indeed a wise man。

—oh, yes How often I have regretted ____ __his advice?

A. to take B.taking C. not to take D. not taking

When I got back home, I saw a message pinned to the door _______ “Sorry to miss you; I’ll call later.”（ ）

A. read　　　　　 B. reads　　　　 C. to read　　　 D. reading

The great hall was crowded with many people, _______many children ________on their parents’ laps.

A. including, seated B. including, seating 　C. included, sat D. included, sitting

The chairman thought _____ necessary to invite Professor Smith to speak at the meeting.

A. that　 　　　 B. it　 　　　　 C. this　 　 D. him

An Asian normally does not open a gift in the presence of the giver, ________an American tends to open it immediately when he gets it. 　　　　　　 [2009郑州高一检测]

A. since　 B. while　 C. when　 D. as