单项选择题

A great deal has been done to remedy the situation.

A．maintain
B．improve
C．assess
D．protect
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单项选择题
He is but a child.()

A. probably
B. not
C. hardly
D. only
单项选择题
The governor gave a rather determined explanation to the public().

A. unclear
B. firm
C. short
D. vague
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