—Have you returned the book to the library ____?—Yes, I have ____ returned it.
---Did you use to ____ a bus to school? ---Yes .But now I am used to ____ a bike to school .
--- Are you going to take part in the speech competition? --- _________. It’s too good a chance to miss.
Moyan is the first Chinese person ________ the Nobel Prize in Literature. It’s the first time the Chinese people _________ such great achievements in this field.
_________ green or _________ in a light green room _________ good for us.
_________ he has made! He is hard-working enough to achieve good marks.