—You don’t look well. What’s wrong with you, Wang Jing?— Last night I did my homework and didn’t go to bed_______ 11 o’ clock.
---- How does your father usually go to work? ---- He _____drive a car, but now he _____ there to lose weight.
The math problem is _____ difficult that only _____ students can work it out.
________ fathers are both doctors.
Please __________ the light when you leave the classroom.
When you go _________ the street, you must be careful.