问题: 一道选择题
Some insects are changing their colors to agree with the polluted _____________ on which they rest.
A. backgrounds
B. environment
C. conditions
D situations
选什么?
解答:
background背景;environment环境;conditions条件; situations形势
这句话的意思大概是随着环境的污染,一些昆虫变色去适应他们的栖息地.
所以选B
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