单项选择题

How does that Racoon cross water

A．It swims.
B．It raises its nose.
C．It uses hydrojets.
D．It uses its four-wheel drived.
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单项选择题
Why will Boeing not need a replica of the 777
A．It can use computers to check the design.
B．It already has enough experience with plans.
C．It will only need to upgrade the replica of the previous model.
D．It can make sure all the bits fit together.
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