Question

If city noise _______ 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 kept; have to

Answer 1

A

keep sth. from doing sth.的被动形式；have to可以用于任何人称。