Wouldn’t it be _____ wonderful world of all countries if the world lived in _____ peace with one another?

A a ；不填　　 B the;不填　 C a ;the 　　　　D the; the

----Jack bought a new mobile phone the other day

　 ----______? That’s his third one in just a year.

A. Had he　 B, Did he　 C, Does he　 D. Has he

.Christmas is a special holiday when the whole family _____________________(应该聚在一起).（suppose）

Scientists are convinced　 the positive effect of laughter　 physical and mental health.

　 A．of; at　　 　 B．by; in　　 　 C．of; on　　　 D．on; at

---Jenny took the 8:00 bus to Guangzhou this morning.

　 ---Really? He 　　　 the 9:00 train. It’s much more comfortable and safer to travel by train.

　 A．could have taken　　　　　　　　　　　　　　 B．should take

　 C．must have taken　　　　　　　　　　　　　　 D．can take

The beef is too expensive. I won’t buy it _____.

A. at that price 　 B. at a that price

C. on that price 　 D. in that price

It was some time ______ we realized the truth.

A. when　　　 B. until　　　 C. since　　　 D. before

A v ______ is one who is harmed or killed by another.

The teacher asked Mike to help give 　　　 the books to all the students.?

A.away　　 B.up　　　 C.in　　　　 D.back?

The reason __________he succeeded in passing the exam is

___________he worked very hard.

A. for; why 　 B. for; that

C. why; that　　　 D. why; how