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）
小题1:Mary passed her exam because she studied very ___________(hard).
小题2:That’s the ________(enter) to the hall. Please come this way.
小题3:Look! How ________(happy) Kate looks after hearing the bad news! 
小题4:The man in his           (forty) is the person who saved that boy.
小题5:I can’t __________(simple) understand what you said.
小题6:We Chinese people devote much time to __________(help) rebuild Yushu.
小题7:Jim __________( not be) late in the past.
小题8:He’s _________(ever) been to Beijing before, has he?
小题9:All the children should____________(treat) well after the earthquake.
小题10:---What do you think of my advice? ---Sorry. I _______(think) of something else.