问题
选择题
Jack is ______go to school,so his mother has to stay at home to look after him.
A．young enough to
B．old enough to
C．too young to
D．very old to
答案
答案：C
考查too…to…太……而不能结构。 根据so his mother has to stay at home to look after him可知他太小而不能去上学，所以选C。