单项选择题

() in the mountains for a week, the two students were finally saved by the local police.

A.Having lost
B.Lost
C.Being lost
D.Losing

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单项选择题

If you () tomorrow, I might have time to discuss this question with you.

A.were to come
B.will come
C.come
D.are to come

单项选择题

There were dirty marks on her trousers () she had wiped her hands.

A.where
B.which
C.when
D.that

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