单项选择题

（）,I should ask them some questions.

A．Should they come to us
B．If they come to us
C．Were they come to us
D．Had they come to us

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单项选择题
Our children and grandchildren will（）if we don't look after our planet.

A．endure
B．suffer
C．tolerate
D．bear
单项选择题
Many a person in this circumstance （）for a long break.

A．have hoped
B．has hoped
C．are hoping
D．has been hoped
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