_______(When/While) Marry was writing a letter ,the children were playing outside.

_______(When/While) Marry was writing a letter ,the children were playing outside. while,as,when 区别? when while as 区别 while&when的区别. when while的区别 when while 的区分 when和while区别 When British people say American football,American people say _______ while they mean the ...When British people say American football,American people say _______ while they mean the same thing.A.American footballB.footballC.soccerD.American socc Do you know _______ the plane takes off?A.when B.while C.if D.what选什么,问什么? ***WHEN与WHILE用法区别? as when while 的区别 While和When的区别? when和while的区别 when和while的区别 When While As 的用法 when ,while,as的区别 while和when的用法 until after while when 区别