选择合适的短语,并用所给词的适当形式填空,补全句子.

题目

选择合适的短语,并用所给词的适当形式填空,补全句子.
选择的：die of；die out.
1.Many old customs（风俗）are（）in our life.
2.Nowadays,more and more people（）all kinds of cancer（癌症）.

答案

1）die out
2）die of