he will be back in a few minutes 为什么要加in

he will be back in a few minutes 为什么要加in he will be back (in a few minutes).对扩号提问 Joe will be back _____.A:in a few minutes B:in a minutes C:i The will be back in(a few days')time.为什么加s’ 为什么He said he would be back in a few weeks中的would后面加be?加了be不 He will come back in a few "I think he will come back in a few minutes" 请问这句话要怎么改成 反义疑问 He will be back in ten minutes.He will return in ten minutes he 【will be ,is 】back in five minutes. 连词成句.five,he,back,minutes,will,in,be. The doctor will be with you in a few minutes. He will be back __ a few weeks.A.in B.on C.for D.at