北京东城区示范校2011届高三综合练习（二）

It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he ___ be very cold.

A. can                      B. must              C. will                       D. shall

北京东城区示范校2011届高三综合练习（二）

Most of the roads were covered with thick snow, ____ made our journey more difficult.

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

北京东城区示范校2011届高三综合练习（二）

 So involved with computers ____ that the leaders at the summer computer camps often had to force them to break for sports.

A. has the children become                       B. did the children become

C. has become the children                       D. became the children

北京东城区示范校2011届高三综合练习（二）

Children are ____ to meet with setbacks as they grow up, so their parents don’t have to worry about it.

A. possible                    B. due             C. necessary                      D. bound

北京东城区示范校2011届高三综合练习（二）

_____ computers are convenient to us in daily life, it may also cause other problems.

A. Whether            B. Because      C. As              D. While