问题
选择题
If city noises ___from increasing, people __ shout to be heard even at the dinner table 20 years from now.
A．are not kept; will have to
B．are not kept; have to
C．do not kept ; will have to
D．do not keep; have to
答案
答案：A
noise是 keep的承受者,所以用被动语态.