I don’t think he could have done such a stupid thing last night, _____?
The students entered the classroom, smiling and _______, and _____ down to have their lessons.
If your knowledge can be in some way ______ with my experience, we are sure to succeed.
If you put too many oranges in that paper-bag it will _____.
The physics teacher told the students to observe carefully what would happen when a (n) _____ acted on the object.
Practising Chinese kung fu can not only _____ one’s strength, but also develop one’s character.