1.Things can easily go wrong when people are __under__ stress.
2.It was a time __when__ girls' education was always placed second to boys'.
3.He is not equal __to__ the position and we'd better get somebody else to do it.
4.The country has been __at__ war with its neighboring country for five years.
5.The doctor ordered that she __take__(take) a rest for a week.
6.If children are badly brought __up__, they behave badly.
7.We were put __in__ a position where we had to answer violence with violence.
8.Our English teacher put particular stress __on/upon__ the importance of reading English aloud.
9.It's high time we went/should go (go) to the theater.
10.The reason __why__ some people become ill is that they don't pay attention to their health.