单项选择题
A computer（）think for itself，it must be told what to do.
A.can’tB.couldn’tC.may notD.might not
单项选择题 “Can I join your club，Dad？”“You can when you（）a bit older.”
单项选择题 There is a saying that（）and doing are two things.
单项选择题 The boy is too young to（）himself.
