last week our english teacher set so difficult an examiation problem as none of us worked out如题：为什么要用as?我一开始用的是that,据我理解是that后面加完整的句子.所以不用that,但我不明白为什么用as,感激不尽!

A few American______visit our school last week last week,in last week有什麽区别?原题是这样的：we returned to our hometown last week (2/2)ting _ our school last week. last week we visited our aunt.谁知道啊 11111 we,last,our,visvitde,aunt,week连词成句 Last week a group of ____ visited our school (canada) Do you know the results __ our exam last week? several _____(foreigner) came to vidit our school last week. last week last.week 把we moved to our new flat last week..用next week改写句子 there are fifteen acts in our school talent show last week(用next week改写) last week,a UNICEF woker came to our village.对划线部分提问划线部分是last week We visited our friends last week.（对划线部分提问） 划线部分是：our frienfds 英语翻译During this year's Reading Week ,i read the most books in my class.My classmates and i love our Reading Week .We can read any book from the school library .We can even bring in books and magazines from home ,but we have to tell our Englis on last week还是in last week Our school w() a match in Jiangsu last week .We were very excited Last week our school held a sports meet.改为将来时.