— Must I return the book this week?
— No, you ____. You can _ it for 20 days.
| A．mustn't: keep | B．needn't; borrow | C．needn't; keep | D．mustn't; borrow |
Our rooms __________ by my mother three times a week.
| A．cleans | B．are cleaning |
| C．is cleaned | D．are cleaned |
Julia ________drinking water over an open fire when I saw her.
| A．was boiling | B．boiled |
| C．is boiling | D．has boiled |
I ________this book for about a month, so I have to return it as soon as possible.
| A．have borrowed | B．have kept |
| C．have bought | D．have posted |
____ of the students in our class _____ girls.
| A．Three fives, is | B．Three fifths, is |
| C．Three fifth, are | D．Three fifths, are |
--I got another B in my exam. I don’t know how to overcome the spelling mistake.
--You should remember _____ you check the paper, the_____ grades you will get.
| A．the more careful, the more |
| B．the less carefully, the fewer |
| C．the more carefully , the better |
| D．the more careful, the less |