Put the verb into the most suitable form. Choose from the following: present continuous (I am doing) will ('11) / won't present simple (I do) will ...

Put the verb into the most suitable form. Choose from the following: present continuous (I am doing) will ('11) / won't present simple (I do) will be doing
3 A invites B to a party.
a : (1) (I / have) a party next Saturday. Can you come?
b : On Saturday? I'm not sure. Some friends of mine (2) .................................................. (come) to stay with me next week, but I thin k (3) (they / leave) by Saturday. But if (4) (they / be) still here, (5) .................... ( [ / not / be) able to come to the party.
a : OK. Well, tell me as soon as (6) (you / know).
b : Right. (7) (I / call) you during the week.


(1) I'm having
(2) are coming
(3) they'll leave
(4) they are
(5) I won't be
(6) you know
(7) I'll call