future tenses (will, be going to, might, may)

What are your plans for next week? I ______ (to fly) to New York on business. Probably on Tuesday but I haven't bought my ticket yet.

She definitely ______ (to run) tommorow because she has broken a leg

Which tense/structure is best to use for predicting the future based evidence?

Which tense/structure is best to use when predicting the future based on opinions and beliefs (without evidence)?

Summer ______ definitely _________ (to get) hotter. 

In this area  we _____ (have) more floods (50%)

I am sure the population of the Earth ________ (to go up).

I think  next year ________ (to bebe) better

Our class ________ to an excursion on October  23rd (to go).

Which tense/structure is best to use for uncertain predictions (when we are less sure)?

I don't think they ______ (to spend) their holidays by the sea again.

Why are you wearing your best suit? I ______ (to have) lunch with my biggest customer.

I've already decided. I ______ (to buy) a new car

The problem_____ (to disappear) (50%)

I suppose there ________ an economic crisis soon (to be).