（1）主干 因为末班车没来，所以我们只好走回家 Half an hour had gone by，but the last bus has not arrive，so we have to walk home.
（2）玛丽对汉语考试很担心，因为她没背熟课文 背熟：learn…by heart Mary seems to be worried，because she has not learn the text by heart.
(3)篮球赛被推迟是原因，去博物馆是结果Since the basketball had been postponed，so we might as well visit the museum.
(4)他和父母住在澳大利亚在整个二战期间In the all World War II，he lived in Australia with his parents all the way.
(5)自从用since表示，我与我的大学同学失去联系。Since I graduated from Nanjing University in1985，I lost touch with my classmates.
