Although the teacher did not mention any names, everybody knew who he was ____.

we _____ the cost of the holiday and think that we could offord it. 

Our teachers promised to attend our class meeting, but they haven’t ____ yet.

This book is said to be a special one, which __________ many events not found in other history books．

—If you like the model car, you can _____ it. I don’t want it.—Thank you very much.