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

Cleaning women in big cities get _____ by the hour.

A. pay    B. paying      C. paid          D. to pay

The samples__________in quality but were general acceptable．

A. varied         B. changed     C．disagreed      D．Exchanged

You can't camp________you like these days. Many natural areas are now under protection.

A．whichever   B．wherever  C．what   D．when

The ________ for tonight’s talk is protecting the environmet.

  A. title          B．subject      C．news      D．theme

When I went in , they were ____ in a heated discussion .

A .absorb   B .absorbed      C .absorbing       D .being absorbed

______ is know to all, china will be an________ and powerful country in 20 or 30 year’ time.

A. That, advancing   B. This, advanced    C. As, advanced  D. It, advanced

In communication, a smile is usually ______ strong sign of ______ friendly and open attitude.

You’d better spend your time just on the things you find ______.

— Hi, what did our monitor say just now?

— Every boy and every girl as well as teachers who are to visit Water Cube ______ asked to be at school gate before 6∶30 tomorrow morning.