单项选择题

I know Bob ()but I have never actually spoken to him.

A. by sight
B. out of sight
C. in sight
D. on sight

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单项选择题

() radio and TV have changed many aspects of our lives, so laser will bring about great changes in science and technology.

A. Much as
B. As far as
C. Just as
D. As for

单项选择题

Many people favor ()more nuclear power plants.

A. to build
B. build
C. built
D. building

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