While we were in a boat on Kunming Lake ,we heard someone Beijing Opera on the bank这句话对不对

( )we were having breakfast,he came in.A.while B.when C.after 选哪个?为什么? We learned a little Japanese ___ we were in Japan .( C )A:as B :till C :while While _____ in the room,we were all very excited.A.waited B.waiting C.to wait D.waitwaiting 为什么? My nephew ____ as our guide while we were travelling in London.A.played B.showed C.acted D.performed We were working in the fields()it began to rain.A while B if C when D thought The students in Class One were having a P.E class()we were having a math class.A.when B.while C.asD,since _____ we were swimming in the river,we saw a fish jump out of the river.A.When B.While 请问到底选哪个?为什么? We were getting in the wheat ()suddenly it poured with rain.A.while B.when C.as D.before题意我懂,就是不明白选什么. we were reading books ,----- he knocked the door.选填 A.as B.while C.after 选择填空 ()1.While we were in our countryside ,we could see many trees on ( ) side of the ro选择填空()1.While we were in our countryside ,we could see many trees on ( ) side of the road A.each B.both C.every()2.-- Where’s Henan ---- It’s While we were in a boat on Kunming Lake ,we heard someone Beijing Opera on the bank这句话对不对 We _____ leave _____ it began to rain ..A.were not going to ,when B.were about to ,whenC.were to ,while D.were about to ,as 状语从句1、Bob's leg got hurt _____the Purple Mountains.A)while he is climbing up B)while we were climbing upC)while we climbed up D)while he climbed up2、______quite recently,most mothers in Britain did not take paid work outside the home.A)be （ ）the teacher came in, they were talking and laughing. A.while B.when what happened while you were _the telephone?a.at b.on c.in d.over We were very close friends for a while,but … while we were swimming in the river,we saw a fish jump out of the water=__in the river,we saw a 英语高手进啊345We were having a test in our classroom this time yesterday______a bird flew in through the open window A.when B.while我觉得两个都可以么.