问题
选择题
The Changjiang River has been polluted badly and is not good _______．
A．to swim it
B．to be swum in
C．to swim in it
D．to swim in
答案
答案：D
考查不定式的用法。swim是不及物动词，应该是swim in the river；介词in不能省略，排除A、C；sth. is +形容词+to do sth.用不定式的主动形式表被动含义。故选D。