It is true that knowledge _______ rather than being taught.
Not only Tony but also Betty ______ to go sightseeing with friends.
There is no ______. I have to write it on the blackboard with ______.
---Where is your brother? ---He is in Beijing. He _____ back in three days.
---Would you like to go bike riding with us tomorrow? --- _________.
Wow ! Everything ______ half price. That is too great .