Thank you very much for teaching me both the British English and the American English alternative. By the way, do you say "What time do we land?" Is the use of the simple present correct in this sentence?

I just want to make sure the following two sentences I need to include in a test are possible.

1) Look at the child on the bike! He..... (fall). He is going to fall.
2) It's ten days since they..... ( divorce). It's ten days since they divorced.
3) I ...... (not do) any work since the beginnig of February. I haven't done any work since ..

Yes, "What time do we land?" is correct.

And yes, your 3 answers for the test sentences are correct, too.

Nice!