Wael Shaltoot posted:
Sorry, I have updated the post. In addition, I have added, Soon. Does this change the matter? This what the outside book has written. Again, Sorry for the misprint.
Yes, it does change things. All of the answers are possible. That is, none of them is incorrect. Here is how I would rank them in order of naturalness:
most natural: "Our plane leaves soon."
second most natural: "Our plane is leaving soon."
somewhat natural: "Our plane is going to leave soon."
least natural: "Our plane will leave soon."
In the future, if you wish to change your examples, please do so in a separate post, especially if the original examples have already been responded to, as here. Because you changed the original post, my first reply now appears to be responding to something other than what you wrote. Do you see the problem?