While i was drawing,I saw some people ___by the river. A sit B sat C sitting D to sit

While i was drawing,I saw some people ___by the river. A sit B sat C sitting D to sit he was drawing something on the desk (while) i was reading a story yesterday.这个句子能不能用when代替while?解释为什么? I was interested in drawing when I was little.(对“drawing提问） I was drawing a horse_____the teacher came in.A while B as C when D the moment为什么?请说明原因.谢谢! I was drawing a horse_____the teacher came in.A while B as C when D the moment为什么?请说明原因. I was having trouble just drawing breath中drawing breath是否是分词,修饰trouble While I was still while I still love,ok? I am drawing on the computer when Jim came to see me yesterday evening 这句话的时态对不对是用I am drawing 还是I was drawing while I was doing可省略I was吗 I was cooking while my sister was sleeping I´m drawing, I singing someone doing heard my honework while was I I was doing my homework while my father was reading newspapers为什么填while He was drawing something on the desk ___I was reading a story at ten yesterday.A:after B:while C:before D:when选哪个呢?为什么? Thanksgiving day was drawing near I tried to call you____ I heard from him,but you were not in.a.since b.while c.until d.as soon as为什么答案选DWork hard,_____you may catch up with your classmates soon.a.or b.but c.and d.yet为什么选CI was drawing a horse_____the teacher cam While I was walking in the street,I met Liu Dehua.转化为I met Liu Dehua while I was walking in the street.while换when, While I was watching TV,the phone______(ring) 填什么