Question

【题目】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 keep; will have to D. do not keep; have to

Answer 1

【答案】A

【解析】

句意：如果不能阻止城市噪音的增加，20年后人们甚至在餐桌上都要大声喊叫才能听到。从主句中的20 years from now 这一时间状语看主句谓语动词要用一般将来时。根据我们所学的语法规则，如果主句是一般现在时，一般将来时或者是祈使句，在if引导的条件状语从句中谓语动词要用一般现在时。还要注意city noises和keep是被动关系。故答案为A。