单项选择题
Could you please tell me _____ to repair our fax machine
A．how much it costs
B．how much cost is
C．how much costs it
D．how much does it cost
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单项选择题
Since 1970, Mr. Johnson ________in this hospital and he loves the job very much.
A．has worked
B．will be working
C．has been working
D．is working
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单项选择题
Being defeated for the third time, it seemed to him that it was no use_______ anything any more.
A．to try doing
B．trying to do
C．to try to do
D．tried to do
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