单项选择题

As there was a power cut in the hospital, the surgeon had to () the operation.

A．call for
B．call on
C．call off
D．call up

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单项选择题
After the theft of his car he put in an insurance () for ￡3,000.

A．account
B．invoice
C．assessment
D．claim
单项选择题
The new aircraft () its tests very well.

A．experienced
B．hurried
C．supported
D．underwent
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