单项选择题

Mr. Green said his clients ______ our samples by the end of last month.

A．didn"t receive
B．hadn"t received
C．haven"t received
D．don"t receive
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单项选择题
The amotmt of heat produced by this electrical apparatus is ______ at will by turning a small handle.
A．different
B．diverse
C．variable
D．various
单项选择题
I decided to go to the party as soon as I ______.
A．would finish what I was doing
B．finish what I did
C．finished what I did
D．finished what I was doing
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