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

I won't be able to play outside with you tomorrow because I ______ my homework at that time.

A．shall have done
B．will do
C．will be doing
D．shall be done

单项选择题

______ a sales meeting in my company tomorrow evening.

A．There will be held
B．There is going to be
C．There be
D．There is going to

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