问题补充:
Since you are in a public place, the noise of your radio must be to a level that we all feel comfortable with.
A. supposed
B. allowed
C. attached
D. limited
答案:
A. supposed
B. allowed
C. attached
(答案→)D. limited
解析:动词辨析。be limited to限制在…; be attached to附着于…;句意:因为你在公共场所,你收音机的音量要限制在一个我们都感觉舒服的水平。