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 toB.are not kept, have toC.do not keep, will have toD.do not kept, have to在线课程A
命题目的主要考查时态。
解题方法从主句中的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，正确答案为A。