用所给动词的适当形式填空
1.I don't think it is worth_________(do)
2.How soon_______he_______(return)from his office.
3.Three_____(be)enough food for everyone when we grow up.
请解答,并讲解。谢谢
用所给动词的适当形式填空
1.I don't think it is worth_________(do)
2.How soon_______he_______(return)from his office.
3.Three_____(be)enough food for everyone when we grow up.
请解答,并讲解。谢谢