单项选择题

The story does not say this, but from what we have read, we can tell that ______.

A．fruit trees do not need help from insects
B．praying mantis always lives in a house
C．some people know nothing about insects
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单项选择题
How many kinds of insects are helpful to people
A．I don't think the story tells us.
B．All kinds.
C．You can count yourself.
单项选择题
Bees make ______.
A．silk
B．fruit
C．honey
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