问题
选择题
_____ the environment is important for human beings.
A．Take care of
B．Taking care of
C．Took care of
D．Take the care of
答案
答案：B
考查动名词短语作主语，分析句子成分，这里需要填动名词做主语，谓语动词用单数形式。句意：保护环境对人类是很重要的。选B。
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