单项选择题

On the whole, this passage is about ______.

A．how to put up high antennas
B．a way of picking up better TV programs
C．how to use the empty channels on your TV set
D．the way that TV signals are sent

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热门试题

单项选择题

Cable TV is becoming more and more popular because ______.

A．it is free of charge
B．it can provide more programs
C．it provides all TV users good pictures
D．TV sets with regular antennas can also have a good reception through CATV

单项选择题

Mary ______ crazy. She burst into laughter now and then for no reason at all. A) must go C) must have gone B) may be going D) could have gone

A．Mary ______ crazy. She burst into laughter now and then for no reason at all.
B．must go
C．may be going
D．must have gone
E．could have gone