Not only oral English but also written English _____ important.
A. is B. are C. was D. were
—We’ll make a trip to Hainan Island next weekend. Will you go with us?
—No, I can’t _____ it at present.
A. afford B. save C. offer D. accept
—How many students are there in the classroom?
—_____ I don’t know where they have gone.
A. No one. B. None. C. Nobody. D. Nothing.
The rubbish _____ is produced every day is becoming a serious problem in cities around the world.
A. that B. who C. where D. whom
More and more trees were cut down. _____, many animals are dying out.
A. In the end B. So that
C. As a result D. At last
We should often keep _____ touch with each other, because we are good friends.
A. on B. to C. in D. up
