---Do you know Miss Tang?---Yeah, she is an excellent teacher, ______she is famous ______a wonderful singer in our school.
It is very _______ of you to speak in front of all those people .
---Do you often play computer games? ---No, And so do ________ of my classmates, you know we are very busy
I don’t know _____ or not he will come . _______ he comes , I will call you .
The robot needs _______ once a month. And we will check it for you for free.
We didn’t know how to find them because they didn’t tell us _______.