单项选择题

In paragraph one, the phrase "hang back" stands for" ______ ".

A．cling to
B．suspend
C．frustrate
D．hesitate
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单项选择题
The Do - It - Yourself Movement may not have a bright future; all of the following reasons are true except ______.
A．the high cost of labor
B．the expense of tools
C．too much time spent on it
D．the wear and tear on the nerves
单项选择题
As an amateur, you' ll have to ______ first.
A．follow the instructions in magazines
B．get the right tools
C．prepare fully psychologically
D．ask a skilled craftsman' s advice
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