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北京東城區示范校2011屆高三綜合練習（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

北京東城區示范校2011屆高三綜合練習（二）

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

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

北京東城區示范校2011屆高三綜合練習（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

北京東城區示范校2011屆高三綜合練習（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

北京東城區示范校2011屆高三綜合練習（二）

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

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