John's success has nothing to do with good luck. It is years of hard work has made him what he is today.
Nowadays, teachers should give less homework to students in order to ______ the amount of pressure they have.
He was crazy ______ his study when he was young, which contributes ______ his success in later life.
I try to avoid ______ her because she is ______ to scold me for my mistakes.
The fire started on the second floor and it wasn't long ______ the whole building was burned down.
______ to computer games, the boy began to dislike school, which made his parents worried.