请展开查看知识点列表
a. always
b. seldom
c. never
d. sometimes
e. usually, often
⑴at no time
⑵many times
⑶less than often, more than seldom
⑷all the time, every time
⑸not many times
— Twice a day.
Your mother has never tried shopping on the Internet, ?
进入组卷
