If city noises ______ from increasing, people______ shout to be heard even at the dinner table 20 years from now. (MET1992 )

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

科目 英语   题型 单选题   难度 容易

知识点： 动词语态