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题目内容
（河南科技大学大学英语3(专升本)）
The pests that have different colors from plants usually appear at night because ______.
A:birds take their rest when night comes
B:their enemies can easily find them and eat them
C:they have the habit of coming out in darkness
D:it.s easy for them to destroy plants in darkness
A:birds take their rest when night comes
B:their enemies can easily find them and eat them
C:they have the habit of coming out in darkness
D:it.s easy for them to destroy plants in darkness
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