My history teacher said that I ________ do better．
| A．can | B．could | C．was | D．was can |
You’d better _______ too much meat. You are much too fat.
A . not eat B.eat C.not to eat
— 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