单项选择题

If a baby bird stays ______ for two or three weeks after leaving the nest, it has a fair chance of becoming an adult.

A．living
B．lively
C．alive
D．live
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单项选择题
You should never ______ your promise to a child.
A．go back on
B．go after
C．go in for
D．go over
单项选择题
It is necessary that everyone ______ a copy of this book.
A．has
B．could have
C．will have
D．should have
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