I _______ keep dogs for protection, but now I keep them as pets.
| A．would rather | B．had better | C．used to | D．have to |
— There are so many new words in the passage.
—You’d better ______ in the dictionary.
A.look them up
B. look up them
C. look over it
He suggests _____ camping this weekend.
A. to go B. go C. going
It’s ___________ to take the subway to visit Paris. It can take you wherever you want to go.
A. convenient B. inexpensive C. crowded
You won’t catch what he said _____ you listen carefully.
A. if B. after C. Unless
Our teacher warned us ______ play tricks _____ others.
A. to; at B. not to; on C. not to; to