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

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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

单项选择题

If you ask them, they'll be ______ pleased to accept your invitation. A) only too C) only so B) rather too D) too much

A．If you ask them, they'll be ______ pleased to accept your invitation.
B．only too
C．rather too
D．only so
E．too much