--- Can you spell your name, please?--- Yes, I _________.

 The red bike _______be Hu’s. She has a blue bike.

 Sorry, I’m late. I ____ have turned off the alarm clock and gone back to sleep again.

According to the factory safety rules, all accidents _____ be reported to the safety officer.

 — Must I do the rest of the work today?— No, you _________  finish it tomorrow.