【3.---____thesportsmeetmightbeputoff．---Yes,italldependsontheweather．A．I'vebeentoldB．I'vetoldC．I'mtoldD．Itold,但是想问下为什么不选C?还有4.Ineedonemorestampbeforemycollection___.】

　　3.---____thesportsmeetmightbeputoff．---Yes,italldependsontheweather．

　　A．I'vebeentoldB．I'vetold　C．I'mtoldD．Itold,但是想问下为什么不选C?

　　还有

　　4.Ineedonemorestampbeforemycollection___.

　　A.hascompletedB.completes　C.hasbeencompletedD.iscompleted答案选D,为什么不选C?

　　5.Rainforests___andburnedatsuchaspeedthattheywilldisappearfromtheearthinthenearfuture.

　　A.cutB.arecut　C.arebeingcutD.hadbeencut答案选C,而不选B?