单项选择题

There is no hurry. You can take your time ______ those exercises.

A．doing
B．to do
C．done
D．to be doing
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单项选择题
Dr. Jones ordered ______ for the laboratory.
A．two pieces of equipments
B．two equipments
C．two pieces of equipment
D．two piece equipments
单项选择题
Please let's have more time, ______
A．shall we
B．will you
C．won't you
D．don't you
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