_____ the environment is important for human beings.
A．Take care ofB．Taking care ofC．Took care ofD．Take the care of
B
考查動(dòng)名詞短語作主語，分析句子成分，這里需要填動(dòng)名詞做主語，謂語動(dòng)詞用單數(shù)形式。句意：保護(hù)環(huán)境對(duì)人類是很重要的。選B。
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