刘奇老师，向你请教几道题1.____Chinas(此处为所有格）reform and opening up in late 1978,its quick development has aroused worldwide attention.A. When B.As C.While D.Since答案D2.Scientists generally agree that Earths(为所有格）climate will warm up over the 50 to 100 years ____it has warned in the 20000 years since Ice Age.A.so long as B.as much as C.as soon as D.as well as答案B3.I have never seen anyone run so fast-- ____David go.A.just watch B.just to watch C.just watching D.just having watched答案A4.Please tell me ____you want your coffee,black or white?A.when B.what C.how D.while答案C

1.____Chinas(此处为所有格）reform and opening up in late 1978,its quick development has aroused worldwide attention. A. When B.As C.While D.Since 答案D 逗号前后是什么关系？因果吧，排除ac。b有伴随的含义，而题干中有先后的不是伴随。2.Scientists generally agree that Earths(为所有格）climate will warm up over the 50 to 100 years ____it has warned in the 20000 years since Ice Age. A.so long as B.as much as C.as soon as D.as well as 答案Ba表示条件，b表示比较，c表示时间，d表示 也和象。。一样好。自己找两句之间的关系 3.I have never seen anyone run so fast-- ____David go. A.just watch B.just to watch C.just watching D.just having watched 答案A ——后要一个完整的句子4.Please tell me ____you want your coffee,black or white? A.when B.what C.how D.while 答案C 宾语从句，从句中主谓宾齐全，少状语。剩下a和c black or white与方式还是时间有关？