Which sentence has the most formal style（）
A. Don’t send anything off until you’re told to do so
B. Please await instructions before dispatching items
C. Please wait for instructions before sending items off
D. When they tell you to send them off, you can start to do it
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Man: What do they do？Woman:_____（）
A. They are flight attendants
B. They are from Japan
C. They like music
D. They are quite busy on weekends
—My cell phone is driving me crazy! It keeps turning off and on.—______. Maybe you should have it checked, or just return it（）
A. I’m sorry to hear that
B. That’s all right
C. It depends
D. No big deal
It is politely requested by the hotel management that radios ______ after 11 o’clock at night（）
A. not to play
B. were not played
C. not be played
D. were not playing
In his junior year, Gates ______ Harvard to devote his energies to Microsoft（）
A. stopped off
B. gave in
C. dropped out of
D. pulled up
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