单项选择题

A．He was invited for dinner.
B．He had a question to ask Newton.
C．He dropped in on his way home.
D．He just wanted to see Newton.
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单项选择题
A．Problems with aircraft.B．Problems with computers.C．Too many passengers.D．Too few pilots and passengers.
A．Problems with aircraft.
B．Problems with computers.
C．Too many passengers.
D．Too few pilots and passengers.
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