问题
选择题
It's dangerous to let the children who are _____ go swimming in the river.
A．too young to
B．so young
C．not old enough to
D．so old
答案
答案：B
若选A和C,意义不完整,因为这时let后面缺少了宾语补足语.
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It's dangerous to let the children who are _____ go swimming in the river.
A．too young to
B．so young
C．not old enough to
D．so old
答案：B
若选A和C,意义不完整,因为这时let后面缺少了宾语补足语.