根据句意，用所给词的适当形式填空： （共10小题，每小题1分，计10分）
Mary passed her exam because she studied very ___________(hard).
That’s the ________(enter) to the hall. Please come this way.
Look! How ________(happy) Kate looks after hearing the bad news! 
The man in his           (forty) is the person who saved that boy.
I can’t __________(simple) understand what you said.
We Chinese people devote much time to __________(help) rebuild Yushu.
Jim __________( not be) late in the past.
He’s _________(ever) been to Beijing before, has he?
All the children should____________(treat) well after the earthquake.
---What do you think of my advice? ---Sorry. I _______(think) of something else.