单项选择题

All flights （） because of the snowstorm, many passengers could do nothing but take the train.

A．had been canceled
B．have been canceled
C．were canceled
D．having been canceled

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单项选择题
Harry was （） by a bee when he was collecting the honey.

A．stung
B．stuck
C．bitten
D．scratched
单项选择题
The speech which he made （） the project has bothered me greatly.

A．being concerned
B．concerned
C．be concerned
D．concerning
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