While I was standing__the window,I saw several boys running__the street第一个空格at没问题,第二个空格填along.为什么不能填on?

while standing什么意思? not while I've been standing here!尤其是not while这种用法, While I was still while I still love,ok? I saw a boy ____ there A.stood B.standing C.to stand D.was standing While i was standing _____ the window,i saw several boys running ____ the streetA.at;along B.on;at C.in;on D.to;in 选哪一个?为什么? While I was standing _____the window.I saw several boys running _____the 接上面没打完。street,A.at along B on at C in on D to in 再问一个：in the wall on the wall She___even when she is in class.Do you know the reason?A looks asleep B looking sleepy C looks sleeping D looks sleepyLin Tao was still looking for me while I was already____ behind himA standing B stand Cstood D being standing while I was doing可省略I was吗 many years ago,when i was driving from denver to parents' home in missouri for christmas.i 1 at a gas station about 50 miles away from oklahoma city.where i was planning to visit a friend while i was standing in line at the cash register.i said hello I was cooking while my sister was sleeping 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 有一些不懂想询问下.1.While i was standing __the window,I saw several boys running___ the street.第一空应用at,on还是in,为什么.2.---Don't forget to bring your book to school.---_________.A.No,I won't.B.OK,I will.这里为什么不能 the chapel was standing room i was standing waiting for you to hug me!翻译中文 Only I was standing in-situ,Is still waiting for you 3Q 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