单项选择题

Directions:
There are ten short incomplete dialogues between two speakers, each followed by four choices marked A, B, C and D. Choose the answer that appropriately suits the conversational context and best completes the dialogue. Mark your answer on the ANSWER SHEET by drawing with a pencil a short bar across the corresponding letter in the brackets.
Man: Excuse me, madam. May I sit here
Woman:______

A．No, you can’t.
B．Yes, you may take the chair.
C．Of course not.
D．I’ m afraid it’ s taken.
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单项选择题
Few airlines want to impose a total ban on their passengers using electronic devices because______.
A．they don’t believe there is such a danger as radio interference
B．the harmful effect of electromagnetic interference is yet to be proved
C．most passengers refuse to take a plane which bans the use of radio and cassette players
D．they have other effective safety measures to fall back on
单项选择题
Why can businessmen make money in the emerging elder market
A．Retirees are more generous in spending money.
B．They can employ more gerontologists.
C．The elderly possess an enormous purchasing power.
D．There are more elderly people working than befor
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