will it take us to fly to Hainan and will the trip to Hainan cost us?

There are four ______ students in my school.

_____ do you go back to your hometown? — Twice a year. [ ]

You must be very tired. Why not ___________a rest?

I think we should make a plan in detail first. Do you agree ________ me?—Yes. Let’s start now.[ ]