If city noises from increasing, people shout to be heard even at diner.
A. do not keep; will have to
B. are not kept; have
C. are not kept; will have to
D. do not keep; have to
网友回答
A. do not keep; will have to
B. are not kept; have
(答案→)C. are not kept; will have to
D. do not keep; have to
解析：考察时态。本题较为简单，在条件状语从句指，用一般现在时代替将来时，后面的主句使用将来时的时态。句意：如果城市里的噪音没有被阻止继续增加，人们在吃饭的时候将不得不大声说话才能被听见。根据句意说明第一空使用被动语态。故C正确。