单项填空1.Thenumberofaircrashesthat________indevelopingcountries________increasing
A.happens;isB.happen;isC.happens;areD.happen;are答案B[aircrashes后定语从句的谓语动词用复数;“thenumberof+复数名词”作主语时,谓语动词用单数
]2.Ericevendidn'thave________commonsensetodialthenumber119when________firebrokeout
A.a;theB.a;/C./;theD.the;a答案D[第一空特指“紧急情况下拨火警电话”这一常识;第二空泛指“一场火灾”
]3.Thehabitofhavingeighthours'sleepanightshewasaccustomedto________greatlysincelastyear
A.changeB.haschangedC.changingD.havechanged答案B[thehabit作主语,shewasaccustomedto是定语从句,谓语应该是haschanged
]4.Thiskindofcloth________well,andthatiswhyit________well
A.washes;sellsB.iswashed;sellsC.washes,issoldD.iswashes;issold答案A[wash,sell用主动形式表示被动意义
]5.Inhisvictoryspeech________beforeahugecrowdofhissupporters,Obamadeclaredthat“changehascometoAmerica”.A.havingdeliveredB.t