单项选择题

A．A car would be like a train.
B．A car could be driven automatically.
C．A car wouldn’t run into another car.
D．The speed of a car could be kept steady.
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单项选择题
A．Sending e-mails.B．Learning things.C．Chatting in chat rooms.D．Collecting information.
A．Sending e-mails.
B．Learning things.
C．Chatting in chat rooms.
D．Collecting information.
单项选择题
A．The woman’s friend.B．Bill’s classmate.C．The woman’s colleague.D．Bill’s workmate.
A．The woman’s friend.
B．Bill’s classmate.
C．The woman’s colleague.
D．Bill’s workmate.
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