根据所提供的语境，从方框中选择适当短语的正确形式填空，使句子完整。（其中有两个多余词）

refer to, be supposed to , be back on one’s feet, lack of, inform… of, speed up,  make any difference,  a variety of,  put one’s hands on,  break down,

1. There must be no life on the Mars for _________________air there.
2. Take these tablets the doctor prescribed and you'll soon _______.
3. Don’t forget to __________ the director ________ the committee’s decision?
4.It’s most upset that you can’t ________________________it when you badly need some thing。  
5. There were representatives from ______________ parts of the world at the conference.
6. It doesn’t ____________________________ to me where you come from.
7. Her health ________________________under the pressure of work.
8. If you don’t know what this means, _________________________the dictionary.