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

These programmes are of immense value to old people().

A. natural
B. fatal
C. tiny
D. enormous

单项选择题

Henry cannot resist the lure of drugs().

A. abuse
B. flavor
C. temptation
D. consumption

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