Betty always ________ me some questions but I can’t answer all of them.

Mike’s parents have bought a 2-floor house with a swimming pool.— Oh, it________ be very expensive.

Just before the Chinese class, I suddenly realized that I forgot _______ my Chinese text book.

I will never forget the days _____we spent in the mountain ten years ago. [ ]

I have decided to _________my bad habit of sleeping in class.—That’s good news. I hope you can do it this time.