【题目】——The air pollution is terrible.
——It will be worse ________ we take action to protect the environment.
A.if
B.unless
C.until
D.when

【题目】I always enjoy visiting London, _________ I wouldn't like to live there.

A.because
B.so
C.but
D.and

【题目】Either you your sisterbecause one of you must stay at home.
A.or, goes
B.nor, go
C.or, go

A. His; she B. Her; his C. They; she D. My; these

【题目】—How is this kind of mooncake?
—It tastes ____ and sells ____.
A.good, good
B.well, well
C.good, well

A. friend B. a friend C. friends D. a friends

A. look it over B. look them over

C. look it up D. look them up

A. How B. What C. What a D. How a

【题目】— Is your friend quiet?
— No, he never stops__________.
A.talk
B.talking
C.to talk
D.talks

【题目】You'd better wear your coat, ______ you will catch a cold.
A.and
B.so
C.but
D.or