初中语法how long vs how soon-Could you tell us___?-For about two weeks.A.how soon you will be backB.how long you will be thereC.how soon are you going to be backD.how long are you going to be away该选哪个?为什么?

初中语法how long vs how soon-Could you tell us___?-For about two weeks.A.how soon you will be backB.how long you will be thereC.how soon are you going to be backD.how long are you going to be away该选哪个?为什么?
初中语法how long vs how soon
-Could you tell us___?
-For about two weeks.
A.how soon you will be back
B.how long you will be there
C.how soon are you going to be back
D.how long are you going to be away
该选哪个?为什么?

初中语法how long vs how soon-Could you tell us___?-For about two weeks.A.how soon you will be backB.how long you will be thereC.how soon are you going to be backD.how long are you going to be away该选哪个?为什么?
应该选择B.
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how long,how soon和都含有how,并且都和“多长时间、多久”有关,但它们的用法不相同.
how long意为“多久、多长时间”,主要是对一段时间进行提问,答语通常是（for）three days/weeks/months等时间段,它可用于各种时态.
How long do you stay in Beijing every year?每年你在北京住多久?
How long have they lived here?他们住在这里有多久了?
—How long were you not at school last year?去年你多久没上学?
—About two weeks.约两周.
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how soon意为“还要多久”,是对从某个基本时间到将来某动作结束或某动作发生这段时间提问,常用在一般将来时态的句子中,其答语通常是“in + 一段时间”.
—How soon can you finish the work?还要多久你能完成这项工作?
—In half an hour.半小时后.