原题:
题型:单项选择-四个选项
— Mom, can I go out with Anna tonight?
— Sure, but you ________ come back home by 9:00.
— Sure, but you ________ come back home by 9:00.
| A.can’t | B.needn’t | C.must | D.need |
题目考点:情态动词的选择
