5、oC.veryD.tooBACBChoosethebestanswer.1.Bothhisparentslooksad.Maybethey______whathappenedtohim.A. knewB. haveknownC. mustknowD.willknow2.—Ourcountry______alotsofar.—Yes.Ihopeitwillbeeven______.A.has changed;wellB. changed;goodC.has changed;betterD. changed;better3.—These farmers have been
6、to the United States.—Really?When______there?A.will they goB. did they goC. do they goD. have they gone4.Miss Green isn't in the office.she______to the library.A.has goneB.wentC.will goD. has been5.Thestudentshavecleanedtheclassroom,______?A.sotheyB.don’ttheyC.havetheyD.haven’ttheytopic2