—Is Jack on duty today?

—It　　　 be him；it’s his turn tomorrow.

A.mustn’t　　　 　 B.won’t 　　　　　　 C.can’t　 　　　　 D.needn’t

—Can you give me the right answer ?

　 —Sorry , I 　　　 . Would you repeat that question ?

　 A. hadn’t listened 　　　　　 B. haven’t listened C. don’t listen D. wasn’t listening

What makes the space shuttle _____ is that it takes off like a rocket but lands like an airplane.

　 A. exceptional　 B. strange　 C. unique　 D. rare

At first the institute refused to purchase(購買) the experiment instrument, but this decision was ______ changed.

　　 A. occasionally　 　 B. consequently　

　　 C. backwards　 　　 D. afterwards

The old man sat there quietly as if ________ in thought.

A. losing B. was losing　 C. lost 　　　 D. was lost

The doctor advised my aunt strongly to eat less and exercise more, but ____ didn’t help.

A. what B. this C. which D. it

It’s pity that the quarrel ______their friendship.

A. broke up   B. put down    C. gave up    D. took away

He is a man of few words, and seldom speaks until _____ to.

A. spoken　 B. speaking ?C. speak　 D. be spoken

—Are you used to our food now?

　　—Almost, but ________knife and ________ fork is still a problem.

　　A.the ;／ B.a ; a C.the ;／ D.／;／

_________ an important role in a new movie, Andy has a chance to become famous.

　 A. Offer　　　 B. Offering　　　　 C. Offered　　　 D. To offer