单项选择题

So sudden （）that the enemy had no time to escape.

A．did the attack
B．the attack did
C．was the attack
D．the attack was

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单项选择题

Would you please keep silent The weather report （）and I want to listen.

A．is broadcast
B．is being broadcast
C．has been broadcast
D．had been broadcast

单项选择题

Some researchers feel that certain people have nervous systems particularly to hot, dry winds. They are what we call （）weather sensitive people.

A．subjective
B．subordinate
C．liable
D．vulnerable

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