We want a teacher to teach_______.
_______ necessary for us _______ English well.A.It’s; to learn B.It’s; learn C.That’s; learn
—Watching TV too much _______ bad for your eyes.—I’ll go to bed right away.A.be B.are C.is
We must keep our classroom______.A. cleaning B. clean C. to clean
—Would you mind _______ us in the game?—Not at all.A.joining B.join in C.joining in
Don’t worry. We have _______ time to catch the train.A . a few B.lot of C.plenty of