单项选择题

Reducing the gap between rich and poor is one of the main _______ facing the government.
A、chances
B、challenges
C、chains
D、changes

A.
A、chances
B、challenges
C、chains
D、changes

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单项选择题

The_______action of the policemen saved the people in the house from being burnt.
A、prompt
B、supreme
C、significant
D、vital

A.
A、prompt
B、supreme
C、significant
D、vital

单项选择题

When he was a boy he ________ his talent for writing.
A、demonstrated
B、clarified
C、illustrated
D、approved

A.
A、demonstrated
B、clarified
C、illustrated
D、approved