单项选择题

He expressed concern that the ship might be in distress.

A．despair
B．difficulty
C．need
D．danger
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单项选择题
Techniques to harness the energy of the sun are being developed.
A．convert
B．store
C．utilize
D．receive
单项选择题
The company recommended that a new petrol station (should) be built here.
A．ordered
B．insisted
C．suggested
D．demanded
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