—Would you mind staying in such a noisy room?— No but my son needs a place to study in.A.

问题补充：

—Would you mind staying in such a noisy room?

— No, but my son needs a place to study in.

A. cleaner

B. quieter

C. safer

D. Smaller

答案：

A. cleaner

(答案→)B. quieter

C. safer

D. Smaller

解析：句意：你介意呆在如此吵闹的房间里吗？不介意，但是我的儿子需要一个安静的场所学习。根据上句中的noisy可知，本句是强调学习需要一个更安静的地方；A更干净C更安全D更小；故选B。