6、______.A.18B.17C.16()19.Thestudentsusuallywork____________.A.alldayB.4or5hoursadayC.morethan9hoursaday()20.Thestudentstakejobsto_________fortheirownlife.A.learnsomethingB.makesomemoneyC.findsomehelpII.单项选择。(每小题1分,共20分)()21.I have ______ usefulEnglish dictionary and it helps me a lot
7、. A. a B.an C.the D./()22.YoucanimproveyourEnglish________practicingmore.A.byB.withC.ofD.in()23.—Excuseme,wheredidyougetthebook?[来源:学,科,网]—Iborroweditfromthe________.A.cinemaB.libraryC.parkD.station()24.—Haveyoucleanedyourroom_____?—Yes,I’ve_____cleanedit.A.