You ______be tired. You’ve only been working for an hour.
The written record of our conversation doesn’t ______ what was actually said. There are a lot of mistakes.
After Jack had sent some e-mails, he _______ working on his project.
---Hi Mary, haven’t seen you for a long time. __________--- Fine. What about you?
After completing and signing it, please return the form to us in the envelope ________.
_______the Teachers’ Day ,the students are cleaning the classroom.