单项选择题

They are trying to （） the waste discharged by the factory for profit.

A．expose
B．exhaust
C．exhibit
D．exploit

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单项选择题

The opening between the rocks was very narrow, but the boys managed to （）through.

A．press
B．squeeze
C．stretch
D．leap

单项选择题

Arriving home, the boy told his parents about all the （） which occurred in his dormitory.

A．occasions
B．matters
C．incidents
D．issues

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