首字母填空1篇（初二水平）急!

首字母填空1篇（初二水平）急!
Mary is a 20-year-old girl．Her mother is proud of her because she is a Red Cross nurse． As soon as Mary finished school,she j___________ the Red Cross and was t___________ as a nurse．She was taught that if she meets an accident,she should give the first-aid at once and then s___________ for a doctor．
One day,there was an accident in a busy street.When Mary arrived soon,she saw a woman who had been knocked down by a car l___________ on the street.Mary told the crowd(人群) she is a Red Cross nurse and began to help the woman．She gave the woman a small medical treatment at once．After a while,an ambulance（救护车）arrived．The woman was very g_________ to Mary．Mary said,“You're welcome.It’s my d_________!”

joined
trained
sent
lying
grateful
duty
再问： 6没学过啊
再答： it's my duty .意思是‘是我的责任’
再问： 可是，没学过= =
再答： 是教科书上的还是教辅书的？如果是教辅书上的有不学过的单词很正确！
再问： 老师出的学案，当然这就是作业
再答： 答案就是填 duty