It is recommended that room reservations be made ( ) in advance.

A. better

B. best

C. good

D. Well

【答案】A。比较级。“人们建议提前预定房间会××”。这句话有暗含的比较级形式，将“提前预定房间”与“不提前预定”做比较，所以该题选择选项中的比较级better。