The Changjiang River has been polluted badly and is not good _______．
A．to swim it B．to be swum in
C．to swim in itD．to swim in
D
考查不定式的用法。swim是不及物動(dòng)詞，應(yīng)該是swim in the river；介詞in不能省略，排除A、C；sth. is +形容詞+to do sth.用不定式的主動(dòng)形式表被動(dòng)含義。故選D。
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