great changes----in china since 1919A have been taken place B have taken place为什么答案是B 为什么 不用被动语态

great changes in China there()great changes in Jiangsu 英语作文：Great Changes in My Hometown Great changes in my homtown 英语作文、 great changes Great changes Great changes have taken place in my hometown since 1930.请问句子中的Great changes是什么意思? There have been great changes in computers(同义句）Great changes have __ __in computers There have been great changes in Sunshine Town. 同义：Great changes have___ ___in Sunshine Town. There( ) great changes in Shanghai in the past few years. Great changes _________(happen ) in our city in the past. Great changes happened in China in the 1980s翻译 great changes in our life 英语作文100字 Great changes have taken place in Shanghai's transportation.翻译? Great changes < >place last year in our city Great changes have taken place in our city r____ Great changes have taken place in our hometown的翻译 Great changes __________ in our country since 1978.(take place)