发动机、APU火警探测系统是？

The music sounds ____ .

Three more men ___ to do the work every day.

His bike is broken. It needs ___ soon.

Tom is afraid to speak in ___ public.

He decided ___ school late again.

She needs a partner _______.

It＇s good that ___ have their own ideas about life as well as about being cool.

When I was a student, I was used to ___ at six.

People are not allowed ____ in the cinema, but they will allow __ in the rest room.

He is against ___ computer games.