My cousins ____ at the hotel at about nine tonight.
- A. are arriving(correct answer)
- B. arriving
- C. are arrive
- D. is arriving
Why: My cousins = they: are arriving. B has no be, and C has no -ing.
A212 questions · Elementary · Tenses and Time
Talk about fixed plans with am, is or are + -ing and a future time: negatives, What are you doing…? questions, and when be going to or will fits better. Answers explained.

1.My cousins ____ at the hotel at about nine tonight.
Why: My cousins = they: are arriving. B has no be, and C has no -ing.
2.____ Hoa coming to the wedding next month?
Why: Coming is an -ing verb, so the question starts with be. Hoa = she: Is.
3.Thu ____ the piano at the school concert tomorrow evening.
Why: The concert already has a date. Thu = she, and the verb needs -ing: is playing.
How am/is/are + V-ing with a future time talks about fixed plans, how to ask about plans, and how it differs from be going to.