Since new China was found,he had been looking forward to returning to his motherland eagerly.句子有没语法错误.我觉得had应该改为 has

Since new China was found,he had been looking forward to returning to his motherland eagerly.句子有没语法错误.我觉得had应该改为 has great changes ___ since new China _____in 1949.A.have been taken place ,was founded B.took place,founded C.have taken place / was founded D.have taken place ,founded 选哪个?为什么?中文意思是? How many times has China participated in World Expo since Peopie's Re public of China was founded? he lived in china when he was born 为什么不用since 英语选择,It 5 years since they to China.A.was;moved B.is;moved C.was;has moved Spring Festival is the Chinese New Year.It has been c_____all over China since ancient timesc____首字母填空 rthe communist party of china was founded in 1921,since whengreat changes have taken place in China该句的since when 怎么理解since when 是定语从句吗 怎么分析 连词成句:was,New,founded,on,October,1,China,1949 The Renminbi first came out not long before the new China was set up in 1949. It is 50 years ___the People's Republic of China was founded.A.afterB.beforeC.whenD.since A lot of things （ ）in China since 1978 A.was happened B.have happened C.have been happenedD.happened 1.Jim has made many friends since he [came] to china 为什么不是：Jim has made many friends since he [has came] to china 2.She said she was[ ]{get的适当形式}used to these table manners It____five years since they ____ to China.A.was,moved B.was ,have moved C.is,have moved D.is,moved 2008was a great year,since when it_____great changes in China.A .saw B .has seen C .has seen D.was seeing NEW PHOTOGRAPHY IN CHINA怎么样 great changes ---in china since the people's republic of china ---in 1949A.have taken place;was founded B.has taken place ;was founded C.have been taken place;founded D.took place;founded they_____(live)in china since they___(move)to china 翻译Since when was this