说明λ噬菌体DNA的整合和切除过程。

How was Dr Hill when he heard the young girl's answer？

A．He wasn't happy.

B．He wasn't hungry.

C．He was very thankful (感谢的).

A．clever

B．kind

C．rude

D．polite

He is a very tall young man. He is the second_____man in his company.

A．tall

B．taller

C．tallest

D．most tall

The young man wasn't such an honest fellow ______ he had boasted.

A．that

B．which

C．as

D．what

The young man wasn't such honest fellow ______ he had boasted.

A．That

B．which

C．as

D．what

The young man wasn't such honest fellow ______ he had boasted.

A．That

B．which

C．as

D．what

The young man wasn't such honest fellow ______ he had boasted.

A．that

B．which

C．as

D．what

He wasn't appointed chairman of the committee,______ not very popular with its members.

A．being considered

B．having considered

C．to be considered

D．considering

“Tom meets his new teacher, Her name is Mrs. Green.”

George is a young man. He has a very big dog and he has a very small car, too. He likes playing basketball. Last Monday he played basketball for an hour at his club(俱乐部), and then he ran out and jumped into a car, but his dog jumped into the next one.

"Come here, silly(傻的)dog! "George shouted at it. But the dog stayed in the other car.

George put his key into the lock(锁) of the car, but the key did not turn. Then he looked at the car again. It was not his! He was in the wrong car! And the dog was in the right one! "He's

sitting and laughing at me!" George said angrily. But then he smiled and got into his car with the dog.

George is a young man. He has______.

A．a big dog

B．a small car

C．a big dog and a small car

B、哲学家

C、马戏团主

D、医生