单项选择题

______ does Mr Robinson go to London on business

A．How many
B．How long
C．How often
D．How usually
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单项选择题
______, the workers continued their work in the open.
A．Heavy as was the rain
B．As the rain was heavy
C．As heavy was the rain
D．Heavy as the rain was
单项选择题
I can hardly stand ______ a piano ______ so badly.
A．hearing... being played
B．hearing... playing
C．to hear... playing
D．to hear... play
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