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
You ought to do()your mother tells you.

A．when
B．while
C．as
D．that
单项选择题
Henry, () headmaster of a primary school, is her husband.

A．the
B．a
C．an
D．/
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