问题
选择题
It is well known that biology is ______ science about living things.
A．a
B．the
C．/
D．an
答案
答案：A
选择A。science泛指时一般是不可数名词，当说具体某一门学科市场在前面加不定冠词。
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It is well known that biology is ______ science about living things.
A．a
B．the
C．/
D．an
答案：A
选择A。science泛指时一般是不可数名词，当说具体某一门学科市场在前面加不定冠词。