—（）
—I'm suffering from a stomachache.

单项选择题—I wonder why Mr. Green looks quiet in class. —I'm not sure, but he（）a small accident driving here.

A. could have
B. might have
C. might have had
D. must have had

单项选择题With a lot of difficult problems（）,the manager felt worried all the time.

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

单项选择题The Red Cross would have another million dollars（）to buy medicine for the refugees in the Indian Ocean seaquake.

A.by that
B.with that
C.for which
D.with which

单项选择题Do you know the singer and dancer who（）at the gate

A.is standing
B.are standing
C.is stand
D.standing

单项选择题The driver began to speed up to（）for the hour had lost in the traffic jam.

A.keep up
B.take up
C.catch up
D.make up