The male mosquito（）with his mouth.

A．Only recently did people realize the harmful effect of noise.
B．Noise pollution is the worst kind of pollution we suffer from.
C．People are now trying to find ways to make noise as low as possible.
D．The writer thinks that it is almost impossible for people to avoid noise.

A．we can put noise under control if we take effective measures
B．sometimes we have to shout loudly so that others can hear us
C．shouting is the chief cause of noise pollution nowadays
D．it is important to warn people of the danger of noise pollution