Раскройте скобки употребив future simple или present simple.
1) just before noon. (tom's plane, arrive)
a barbecue on saturday if the weather is nice. (we, have)
3) at one o'clock. (the meeting, start)
4) school in june. (elizabeth, finish)
to the football match tomorrow if we have time. (we, go)
trains in sydney. (we, change)​

1) Tom's plane will arrive just before noon.

2) We will have a barbecue on Saturday if the weather is nice.

3) The meeting will start at one o'clock

4) Elizabeth will finish the school in June

5) We will go to the football match tomorrow if we have time.

6) We will change trains in Sydney

(Я понятия не имею, где тут Present Simple, может, это я ошибся)