It was _________ back home after the experiment.

 A. not until midnight did he go     B. until midnight that he didn’t go

 C. not until midnight that he went   D. until midnight when he didn’t go.

Only when your identity has been checked           .

A. you are allowed to                         B. you will be allowed in

C. will you allow in                       D. will you be allowed in

—John and I will celebrate our fortieth wedding anniversary next month.

—Oh，________！

    A．cheer up    B．well done    C．go ahead     D．congratulations

 — How long do you think it will be _______ China sends a manned spaceship to the moon?

— Perhaps two or three years.

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

 When ______ by the teachers, a student tends to study harder than usual.

A. to be praised                   B. praising            C. praised                           D. to praise

 After recovering from his illness, he was advised to _____ gardening as a hobby.

A. take away   B. take off     C. take up        D. take down 

While dancing happily at home，________．

A．the door bell rang          B．the door bell rings

C．we heard the door bell rings  D．we heard the door bell ring  

When changing lanes，a driver should use his turning signal to let other drivers know________．

A．he is entering which lane  B．which lane he is entering

C．is he entering which lane  D．which lane is he entering   

—Is it height or weight ________ the interviewer should pay attention to?

—Absolutely not．He will consider ________ important to be experienced．

A．which；it       B．that；it  C．which；that  D．that；that

Success came after many       ,in other words,      is the mother of success.

A. failures; failure   B. failure; failure  C. failure; failures D. failures; a failure