- A.How to Reuse Water
 - B.Two Solutions to the Problem of Water Shortage
 - C.Stop Wasting Our Limited Water
 - D.How to Make Use of Seawater
 
- A.seawater
 - B.purified water
 - C.the process of getting rid of the salt in seawater
 - D.the process of collecting salt from the sea oceans
 
- A.to have the used water filtered
 - B.to put chemicals in it
 - C.to pipe it to the users
 - D.to pipe the used water to be purified to a factory
 
- A.turn to the oceans for more water
 - B.reuse used water and make use of seawater
 - C.desalt seawater
 - D.take steps to reuse all water on earth
 
- A.New Uses For Computers
 - B.The Popularity of Home Computers
 - C.The Home Computer Industry
 - D.Computers At Home
 
- A.do experiments with water
 - B.purify the used water and reuse it
 - C.use fresh water once again
 - D.make use of seawater
 
- A.larger and more expensive
 - B.smaller and cheaper
 - C.more difficult to use
 - D.to work more slowly
 
- A.writing letters
 - B.playing games
 - C.doing business
 - D.all of the above
 
- A.check the list of goods and materials that are kept in the store house
 - B.play games for pleasure
 - C.talk with their friends
 - D.write letters
 
- A.good
 - B.well
 - C.sad
 - D.disappointed
 
- A.No, I don’t mind
 - B.Yes, you do it
 - C.Yes, my pleasure
 - D.I’m afraid not
 
- A.No, please don’t
 - B.Yes, please
 - C.No, not at all
 - D.Yes, if you like
 
- A.no more…is there
 - B.not any more…isn’t there
 - C.no longer…is there
 - D.not any longer…isn’t there
 
- A.supposed
 - B.exposed
 - C.supported
 - D.indicated
 
- A.lend…to…borrow…from
 - B.lend…to…borrow…of
 - C.borrow…to…lend…from
 - D.lend…for…borrow…of
 
- A.wouldn’t you
 - B.didn’t he
 - C.weren’t you
 - D.didn’t you
 
- A.for…to keep
 - B.of…to keep
 - C.for…keeping
 - D.of…to have kept
 
- A.took
 - B.spent
 - C.cost
 - D.costed
 
- A.deep…deeply
 - B.deep…deep
 - C.deeply…deeply
 - D.deeply…deep
 
- A.sent
 - B.afforded
 - C.left
 - D.gave
 
- A.is
 - B.will be
 - C.to be
 - D.will have
 
- A.to
 - B.with
 - C.in
 - D.at
 
- A.a larger
 - B.larger
 - C.the larger
 - D.the largest
 
- A.as
 - B.unless
 - C.until
 - D.no matter how
 
- A.think
 - B.thinking
 - C.thought
 - D.account
 
- A.he
 - B.him
 - C.himself
 - D.by him
 
- A.reported
 - B.reports
 - C.has been reported
 - D.has reported
 
- A.helping
 - B.to help
 - C.being helped
 - D.helped
 
- A.attracted
 - B.tempted
 - C.persuaded
 - D.tended
 
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