1、DCAACABBBC_BCBBBBDBBDon_DBBAAAABBB六、不定代词：CBABBCAC七、频度副词：3.4.5.6.八、比较级与最高级ACCBAAAB八、比较级与最高级ACAABBCA九、动词不定式：CBBCDA()1.Its nice _ you _ me with my maths.A.for;to help B.for;helping C.of;to help D.of;help()2.It is necessary _ us _some vegetables every day.A.for;eat B.for;to eat C.of;eat D.of;to eat()3.T
2、he children decide _ their school yard this Friday.A.clean B.to clean C.cleaning D.cleaned()4.This math problem is too difficult.Can you show me_?A.what to work out B.where to work it out C.how to work it out D.how to work out it()5.They are looking forward to _ to the lecture by the famous professor.A.send B.be sent C.being sent D.sending()6.Allen has a pet dog.I often see him _ the dog in the morning.A.walk B.walks C.walked D.to walk
