单项选择题

The sentence "they roll up into little balls" in the reading means ______.

A．they sleep with little balls
B．they play with little balls
C．they make their bodies like balls
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单项选择题
A kiwi bird is ______.
A．as heavy as four hens together
B．as big as a hen
C．as big as an egg
单项选择题
Tom was a good pupil at school.
A．Right.
B．Wrong.
C．Doesn’t say.
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