Mixed modals--Lückentext bitte korrigieren (Englisch)

hey, wäre super wenn sich das mal jemand angucken könnte (habs nicht so mit englisch)

Fill in the gaps with a modal verb form the following list: can/can not, could not, may/might, must, must not, need not, shall, should/ought to, will (`ll), would.

1)Roger has broken his leg.
That means he…(can not)play football this afternoon.
2)If you want my advice, I think you…(could not)buy a new car.
3)I….(can)see a light in the living room, so Frank….()be at home after all.
4)I have got some important news for Dick. Do you think he…(should)be at home this afternoon?
5)I`m not sure where your exercise-bokk is, but I ….(may)have put it in the cupboard.
6)Sue is very good at languages- she …..(can)speak three!
7)No, you…(will)stay up a minute longer – I have already let you stay up and extra hour.
8)I have already found three people to help me, so you….(would)come if you are busy.
9)I looked everywhere, but I ….()find it.
10)….(shall)I get you some cigarettes when I am out shopping?
11)….(might)you like another piece of chocolate cake?
12)I…(can not)stay any longer, I am afraid. It is Mum`s birthday, so I ….should)be late home today.

in den klammern ist meine idee.
danke schon mal. würde mich wirklich freuen :)