The pests that have different colors from plants usually appear at night because ______.<br> A:birds take their rest when night comes <br> B:their enemies can easily find them and eat them <br> C:they have the habit of coming out in darkness <br> D:it.s easy for them to destroy plants in darkness

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

出自：河南科技大学大学英语3(专升本)

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