It is well known that biology is ______ science about living things.
A．a(chǎn)
B．the
C．/
D．a(chǎn)n
A
選擇A。science泛指時一般是不可數(shù)名詞，當(dāng)說具體某一門學(xué)科市場在前面加不定冠詞。
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