___ smoking here will be fined.

I prefer _____ at home to _____ outside.

Parents and teachers should help teenagers control their use of computer games ______be controlled by themselves.

 I had just got up and was about to cook my breakfast ___the telephone rang loudly, but it hung up __I could answer it .

The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent         cause a series of explosions of the nuclear reactors in several power stations.