几个英语选择题,帮下哈Thereisnothingforus____A.worryaboutB.worryingC.toworryD.toworryabout2.SomechildrenarearguingaboutwhatTVprogrammes___A.watchingB.forwatchingC.towatchD.willwatch3.Ihave____worktodothatIcan'tgoou

　　几个英语选择题,帮下哈

　　Thereisnothingforus____

　　A.worryabout

　　B.worrying

　　C.toworry

　　D.toworryabout

　　2.SomechildrenarearguingaboutwhatTVprogrammes___

　　A.watching

　　B.forwatching

　　C.towatch

　　D.willwatch

　　3.Ihave____worktodothatIcan'tgooutwithyou.

　　A.muchtooB.toomuchC.somanyD.somuch

　　我知道答案是DCD,但为什么?