The house I grew up ________ has been taken down and replaced by an office building.

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

Dr. Smith, together with his wife and daughters, _____visit Beijing this summer.

A. is going to     B. are going to     C. was going to     D. were going to

It isn't so much whether he works hard; the question is whether he works _____.

          A. above all    B. in all    C. at all    D. after all

________ of the land in that district _______ covered with trees and grass.

A．Two fifth; is          B．Two fifth; are    C．Two fifths ; is            D．Two fifths; are

Some areas, _____ their severe weather conditions, are hardly populated.

         A. due to       B. but for      C. in spite of       D. with relation to

The number of foreign students attending Chinese universities ________ rising steadily since1990. 

A. is         B. are         C. has been         D. have been

We can never expect____ bluer sky unless we create_____less polluted world.

A. a; a                                   B. a; the

C. the; a                                 D. the; the

When he        the door, he found his keys were nowhere.           

A. would open   B. opened   C. had opened   D. was to open

Once your business becomes international, _____ constantly will be part of your life.

A. you fly  B. your flight

C. flight   D. flying

Every time he had a chance，he would talk about the great difficulty he had         in the new country．

 A．settled          B．settling           C．to settle          D．settle