How long ( )the traveler ( )(stay) in our city 答案是are;staying我觉得应该是will stay为什么可以用is staying？不是只有表示位置转移的动词才可以吗？

How long is the forever? How long does the love HOW long is the marathon? Our forever,how far,how long the? How long is the desk?How tall is the building? How long is the river同意句 How long win the meeting last , How long did the English exam last how long will the play last? how long ----the wangs----(stay)here? How long does the camp last? How long was the show ? 是什么意思快 How long —l keep the book. How long will the morning run last? How long does the journey u___ take How long 什么 the factory 什么? how long is the way home How long should the composition?翻译