If city noises _____ from increasing, people _____ shout to be heard even at dinner table 20 years

fromnow on.    [ ]

A. are not kept ; will have to            

B. are not kept; have to   

C. don't keep; will have to              

D. don't keep; have to

按照规定，降落设备能在大船纵倾达（），横倾达（）时应能安全降落所配备的救生艇筏。

A．5°；10°

B．10°；20°

C．15°；5°

D．10°；25