I don’t have to introduce him to you __ you know the boy. A. until B unless C. since D but
He is ill. I don’t know _______ he will come to school.
—_______ do you prefer, walking or running?—I like running better.
I see Wei Han _______ English almost every morning.
I want to be a doctor when I .
Kangkang won the first place in the _______ in the school sports meet last week.