原题:
题型:单项选择-四个选项
— ________ times do you visit your grandparents every year?
— Three or four times a year. Usually at Mid-Autumn festival and Spring Festival.
— Three or four times a year. Usually at Mid-Autumn festival and Spring Festival.
| A.How long | B.How often | C.How much | D.How many |
题目考点:询问频率的表达方式
