–Hi , Ann. How can you improve your English so much?
--Oh, nothing difficult. The you work at it, the progress you will make.
| A．harder, more | B．more hardly, more |
| C．hardlier, greater | D．harder, great |
— Must I take the medicine every day? — No, you ____.
A. must notB. may notC. don’t have to
We should take ____ active part in the battle to stop the germs.
A.theB.anC. /
_______ necessary for us _______ English well.
A.It’s; to learnB.It’s; learn C.That’s; learn
—Watching TV too much _______ bad for your eyes.
—I’ll go to bed right away.
A.beB.are C.is
We must keep our classroom______.
A. cleaning B. cleanC. to clean