--- How _____ hours do you sleep a day?--- Well, about eight hours. But how _____ sleep do we students really need?
Our school needs help _____ English-speaking students.
This kind of fruit tastes ___ and sells _____.
Please tell the students _____ computer games too much. It’s not good for them.
I’ll call you _________I get to Beijing.
-Mr Li lives______, but he doesn’t feel _____because many volunteers often visit him.