— What should we do to prevent the flu?
—We should keep our rooms_____ and the air fresh all the time.
A. cleaning B. cleaned C. clean
All the students are busy _____ English in the morning.
| A．practising to read | B．practising reading | C．to practice to read | D．to practice reading |
Lei Feng always _____ others first.
| A．thought of | B．thought about | C．thought over | D．thought up |
I have _______ money than you, but I have_______ friends than you.
| A．less, fewer | B．more, more | C．less, more | D．fewer, more |
You shouldn’t leave the door _____when you go out.
| A．close | B．closing | C．open | D．opening |
Jimmy is __________ of the two basketball players, but he is much __________.
| A．the thinnest; smarter | B．the thinner; smarter |
| C．the thinnest; the smarter | D．thinner; the smartest |