单项选择题

The government asked the people to be sure to avoid _______ any water which had not been boiled.

A．drinking
B．to drink
C．having drink
D．not to be drunk
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单项选择题
The _______ in David's character has hindered him from advancement in his career.
A．weakness
B．shortcoming
C．demerit
D．defect
单项选择题
A legislative body has the power not only to pass new laws, _______ repeal laws that have been passed earlier.
A．to
B．but also to
C．and to
D．in order to
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