21、A_______boywastheonlysurvivorintheplanecrash.a.two-yearsoldb.twoyearsoldc.two-year-oldd.two-years-old22、ThetopoftheGreatWallis________forfivehorsestogosidebyside.a.enoughwideb.sowidec.wided.wideenough23、

　　21、A_______boywastheonlysurvivorintheplanecrash.

　　a.two-yearsold

　　b.twoyearsold

　　c.two-year-old

　　d.two-years-old

　　22、ThetopoftheGreatWallis________forfivehorsestogosidebyside.

　　a.enoughwide

　　b.sowide

　　c.wide

　　d.wideenough

　　23、Atthattime,she______onajourneywithherfriend.

　　a.isbeing

　　b.hasbeen

　　c.was

　　d.is

　　24、Selectingamobilephoneforpersonaluseisnoeasytaskbecausetechnology_______sorapidly.

　　a.hasbeenchanged

　　b.willhavechanged

　　c.willchange

　　d.ischanging

　　25、Itwasagreatpleasure________metobeinvitedtotheparty.

　　a.of

　　b.on

　　c.to

　　d.for

　　26、I'llhaveacupofcoffeeand_____.

　　a.twobreads

　　b.twopiecesofbreads

　　c.twopieceofbreads

　　d.twopiecesofbread

　　27、Wecamefinally_________theconclusionthatshehasbeentellingliesallthetime.

　　a.into

　　b.of

　　c.to

　　d.at

　　28、Thepeopleinthiscityhaveplanted________treesalongbothsidesofthestreets.

　　a.alotof

　　b.agreatdealof

　　c.much

　　d.alargeamountof

　　29、WhileIwasintheuniversity,Ilearnedtakingaphoto,____isveryusefulnowforme.

　　a.it

　　b.which

　　c.that

　　d.what

　　30、Don'tforget________thewindowbeforeleavingtheroom.

　　a.havingclosed

　　b.tohaveclosed

　　c.toclose

　　d.closing