It is dangerous to allow the children who are ________ swimming in the river.
A．enough old to goB．not old enough to go
C．not enough old to goD．not old enough going
B
考查enough的位置。首先否定詞not應(yīng)跟在be動詞后面，故排除A；enough修飾形容詞應(yīng)放在形容詞的后面，故排除C；enough to足夠…以至于…，不定式做結(jié)果狀語。故選B。
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