since 1800,china had been a decadent nation__1800怎么读?eighteen zero zero?那since 1949怎么读？

since 1800,china had been a decadent nation__1800怎么读?eighteen zero zero?那since 1949怎么读？ 改错：there have had lots of changes in china since 1979改have had 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 1i have had a tremperature[ ]i had a headache.2mr.black has lived in china[ ]five years ago.为什么1.a.since b.for c.before d.after2.a,before b.for c./ d.since He ____ a lot of friends since he came to China.A.has made B.has had这道题选哪一个A还是B Since China carried out the one-child policy,the population inscrease rate had dropped,but （接下）（接上）much still needs doing.是什么意思啊? they_____(live)in china since they___(move)to china Because had because,so had so,since has become since,why say why. 2道初三语法题It ________ four years since Wilson came to China.A. have been B. hasC. is D. had beenDoctor Li will call you if he _________ next week.A. arrives B. gets toC. reaches A big step _____ to strengthen China's health care systems since we launched an effort in 2008.A.has been takenB.is being takenC.was takenD.had been taken ever since可以直接等于since吗We have lived in Shanghai ever since we came to China .（可以把every since换成since吗） Jim has made many friends since he ___to china. Mrs.Brown ___(teach) English in China since last year. Mary ____ ____in China since three years ago .填什么 nancy has been in china since last year错在哪儿 The Whites______many piaces of interest since they came yo China What have you done since you returned to China? Tom has been at this school since he come to China.对since he come to China提问.