______ that the air conditioners cause so much pollution, I would never have bought one.
A. If I knew B. Did I know C. If I have known D. Had I known
One reason that we haven’t had his letter is that he it to our old address by mistake.
A. might send B. should have sent
C. should send D. may have sent
John, look at the time. ____ you play the piano at such a late time?
A. Must B. Can C. May D. Need
One of the few things you ___ say about English people with certainty is that they talk a lot about the weather.
A. need B. must C. should D. can
--How did you find your visit to the museum, John?
-- ______.
A. By taking NO. 3 bus B. Oh, wonderful, indeed
C. I went there alone D. A classmate of mine showed me the way
--I got a rise in salary!
-- _____________
A. Yes, I think so. B. You did? C. Are you? D. My pleasure.
