词语运用（共5小题，每小题1分，计5分）

用括号中所给单词的适当形式填空。

小题1:Please call me if you have any problems ____________ (work) out．

小题2:Marie Curie received the Nobel Prize ____________ (two) during her life time．

小题3:I think it is ____________ (danger) for children to be close to wild animals．

小题4:The old man has been ____________ (die) since three years ago．

小题5:I know only one of the ____________ (visit)，how about you?

广义的质量是指（），（）两个方面。