The boy has to stay at home to look after his litter sister, __________?

The boy has to stay at home to look after his litter sister, __________?

The boy has to stay at home to look after his litter sister, __________?

1. A.
   does he
2. B.
   has he
3. C.
   doesn’t he
4. D.
   hasn’t he

The boy is ________ to look after his sister.

The boy is ________ to look after his sister.

A．enough old                            B．enough young　

C．young enough                          D．old enough