单项选择题

Because of the popularity of the region, it is advisable to book hotels in advance.

A. possible
B. profitable
C. easy
D. wise
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A great deal has been done to remedy the situation.
A. maintain
B. improve
C. preserve
D. protect
单项选择题
It took us along time to mend the house
A. build
B. destroy
C. design
D. repair
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