单项选择题

School children must be taught how to deal with dangerous（）.

A.states
B.conditions
C.positions
D.situations

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单项选择题

Her mother（）having read the letter when Mary found the envelope open.

A.thought
B.considered
C.admitted
D.advised

单项选择题

In case you feel nervous during the interview，you can make full preparations（）.

A.in return
B.in time
C.in common
D.in advance