posted by Tom Jameson .
heres another the last part.
Classify as Simple, compound, complex or compound complex.
complex-13) The burden of proof should be reversed; that is, no one should be allowed to release any substance into the air until it is proved harmless.
compound-14) This principle is used in the case of drugs and food additives, and Dr. Slavin recommends it for the control of our air.
compound complex- 15) After all, as he points out, the principle can be considered even more logical for air than for food and drugs.
compound-16) We have a wide range of choice in foods and drugs but little choice in air
complex-17) Certainly one thing to be cultivated in the fight against air pollution is greenery, since it gives off oxygen.
compound complex-18) Grass alone on a small plot of ground, fifty by fifty feet, gives off enough oxygen to meet the needs of a family of four.
complex-19) Because of the oxygen-producing ability of green things, it is not facetious to recommend the planting of even one tree.
compound-20) We must preserve our parks and open spaces, and we must suppor the development of even more areas of greenery.
compound complex-21) The council on Environmental Quality recommends that cities build rapid-transit systems not only to eliminate traffic congestion and automobile exhausts but also to provide more space for trees and grass.
compound022) An asphalt campground is not a satisfactory substitute for forest, and a concrete playground is quit different from grassy field.
compound-23) There are many approaches to air pollution, then, and no one of them is cure-all.
simple-24) People must work as individuals and in groups to control air pollution.
25) We do not want to witness a disappearance of blue skies, nor do we want to have to war gas masks to survive.
You're getting the hang of these sentences. :-)
The only sentences you have wrong are: 13, 15, 16, 18, 21
Be sure you know the difference between a phrase and a clause.
13. No. It has two verbs.
21. No. I see only one independent clause.