I wonder ______ that my children have picked up such words.
When the children are busy playing their games.They had better be _____
The boy made ____ fun of me, so I became angry ____ him.
There are many new bikes ____ for you in the shop.I think you can buy one that you like most.
The two sportsmen congratulated each other ____ winning the match by shaking hands.
Faced with financial crisis, we think it is time to ___ the trip to Europe.