当你要介绍别人时,你应该说: ____ _. A. How do you do? B.See you later. C. This is…
Do you find ____ hard to understand real English?
--- Have you ever ____. --- No, never.
These English words are important, please _____.
--- Where is Mary? --- She ____ to Harbin.
I’ve ____ met her before, so I don’t know her.