—Every year, many people get ill because of pollution.
—Yes, that's true. It's our duty to_________ pollution and improve the situation.
A.produce B.provide C.recycle D.reduce
Look at the names of the books. Which one do you think may help you find the useful information about health?
A.The Ways to Learn English B.Teenage Fitness
C.Fashion D.The Diary of a Clever Kid
What a pity! My new computer__________ a virus and it can't work now.
A.catches B.caught C.is caught D.has caught
—Do you go to school by bike every morning?
— Yes, _________it rains heavily.
A.because B.as C.unless D.if
—Can we chat in the library?
—I'm afraid not. We should keep _________.
A.healthy B.clean C.quiet D.warm
—Your sister is very good at cooking! How did she learn it?
— She learnt it by _________.
A.yourself B.you C.herself D.her
