—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
—What do you think this coat is made _____?
—Wool. It’s used for _____.
A.of; keeping warm B.from; keeping warm
C.in; keeping warmly D.of; keeping warmly
_____ the morning of December 1st, 2006, the 15th Asia Games _____ in Doha(多哈).
A.In; held B.On; was held C.At; held D.For; were held
The shoes were worn out, what’s more, they aren’t worth _____.
A.to mend B.mending C.mended D.for mending
—Is it interesting to play computer games?
—Yes, _____ you are interested in playing computer games, you’ll have trouble giving it up.
A.once B.twice C.as D.as soon as
