Xi’an was the last city ______ he visited when he came to China.
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.
I need to get another dictionary, because cover is dirty and page is missing.