Mazen promised that he will/would phone us ...

[ahmad47]

Mazen promised that he ........ phone us as soon as the plane arrives.

A- will
B- would

Note: the question is written like this and may be it has mistakes.
It is from a final test in Egypt.

 

[emsr2d2]

Luckily for you, it appears that someone else on this forum took the same test you did and has already asked the question.
You can read their thread HERE.