I ______ use a clock to wake me up because at six o’clock each morning the first train passes by my house.
| A．couldn’t | B．mustn’t |
| C．shouldn’t | D．needn’t |
--_________is the population of the world ?
--_________about 7 billion.
A. How many; It’s B. What; It’s C. What; They’re
--Have you practiced your English _________?
--Yes, I have . I’ve _________ practiced it.
A. already; alreadyB. already; yet C. yet; already
–I think teenagers should be allowed to go out with their friends in the evening.
–, it’s not safe enough.
| A．I agree | B．I disagree | C．I think so | D．I don’t know |
It is ______ of a problem to be poor than to be dishonest.
| A．more | B．little | C．much | D．less |
I’d like one more apple. It’s red and _______ good.
| A．tastes | B．sounds | C．feels | D．finds |