Fill in the blanks with the following words in their correct forms.

Fill in the blanks with the following words in their correct forms.
expert respiration infect tight efficient
pollution difference save beautiful solution
1.Sore throats are often caused by _____________ problems.
2.Whether the problem is_____________ or not has not been decided yet.
3.Mary pays more attention to the_________of learning,and that's why she always finishes homework earlier than her elder sister.
4.The political leaders should ___________ their control on the research and use of nuclear bombs.
5.The mayor is calling on the citizens to try their best to________the city they live in.
6.We need Jim’s technical ______________ to help us get over this difficulty.
7.Personal_____________ is an important factor to modern people.
8.The causes of indoor pollution_____________ from area to area.
9.Human beings have just begun to learn about the many_____________ inside the buildings that cause a lot of health problems.
10.Flu is usually ______,so the best advice is to stay away from people who get flu.