PLEASE HELP YOURSELF ... WHATEVER YOU LIKE. A. ON B. IN C. OVER D....

10. Please help yourself ... whatever you like.

a. on b. in c. over d. to

Question 4: Fill in each blank with one suitable word.

Everyone wants to reduce polution, but the pollution problem is ....1...

complicated as it is serious. It is complicated ...2... much pollution is caused

...3... things that benefit people. For example, exhaust ...4... automobiles

causes a ...5... percentage of all air pollution. But the automobile ...6...

transportation for millions of people. Factories benefit much ...7... the material

that ...8... air, and water, but factories ...9... employment to ... 10... large

number of people.

Question 5:

a. Fill in each blank with a , an , the if necessary