单项选择题

It is because English is being widely used at present（）

A．why we learn it hard
B．that we learn it hard
C．which we must learn
D．when we should learn

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单项选择题

（）arriving at the burning building, the fire fighters at once joined the local residents in the fight against-the big fire.

A．On
B．For
C．At
D．In

单项选择题

The drunken husband knocked against the table and sent the bowls（）in all directions before he was sent（）by his wife.

A．flying; to sleep
B．flying; sleeping
C．to fly; to sleeping
D．to fly; to sleep

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