题目内容

Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.

A. to see
B. to be seen
C. seeing
D. Seen

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The research is so designed that once _______ nothing can be done to change it.

A. begins
B. having begun
C. beginning
D. Begun

It is said that in Australia there is more land than the government knows _______.

A. it what to do with
B. what to do it with
C. what to do with it
D. to do what with it

A cook will be immediately fired if he is found _______ in the kitchen.

A. smoke
B. smoking
C. to smoke
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—What do you think made Mary so upset?—_______ her new bike.

As she lost
B. Lost
C. Losing
D. Because of losing