Question

You must phone us as soon as you _______ home.
A.will get B. are getting C.get D.will have got

Answer 1

The answer is ‘will get’ because the simple future tense is to be used as it is an inappropriate sentence.

As the sentence is saying that you have to phone a person in future.

You are not calling that person right now or you didn’t call them in the past.

So for calling someone in future, you will have to get to home in future.

Answer 2

You must call us as soon as you_home?