单项选择题

Shortage of capital is the principal factor that ______ economic development.

A．holds out
B．holds on to
C．holds back
D．holds on
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单项选择题
Don't trust him. He is ______ dishonest.
A．perfectly
B．utterly
C．purely
D．exactly
单项选择题
The politician says he will ______ the welfare of the people.
A．prey on
B．take on
C．get at
D．see to
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