They have no classes ________ Saturday and Sunday. A. in B. on C. at D:from
She ______ very hard since she came to our school.
Even Tony’s six-year-old son asked him ______ smoking.
The schoolboy ______ a blind man cross the street yesterday.
— Can he jump high? — Yes, he ______. He is a good high jumper.
It was dark, ______ I couldn’t see what was happening.