原题:
题型:单项选择-四个选项
— ________ you help to wash the car?
—Sorry, Dad. I’m doing my homework.
—Sorry, Dad. I’m doing my homework.
| A.Must | B.Could | C.Might | D.Should |
题目考点:情态动词的用法,尤其是 'Could' 的礼貌请求用法
