1 . We have all heard of the dangers of global warming and the greenhouse effect ,_____ .
A whereas animals breathe in oxygen and breathe out carbon dioxide B so there must have been a chain of some positive events beginning with the Greenpeace C now that we ' ve finished all the reports by deadline and it ' s common knowledge that this is caused mainly by the build-up of carbon dioxide in D the atmosphere E which resulted from the endeavoring and efficient studies of enviromentalists
2 . Leaves are found on all deciduous trees ,______.
A since firs and pines were evergreens B although cactus doesn ' t have any leaves C but they differ greatly in size and shape D and they would do away with the insects E that is also called green leaf tree
3 . The Wassatch Range , which is a part of the Rocky Mountains ,_____
A extends from southeastern Idaho into northern Utah B that a region in a Northern state C whose members were coming from a strict religious sect D connect many of the world ' s businesses , institutions , and individuals through internet E Ruth St . Dennis turned to Asian dances to find inspiration
4 . Since leaving the presidency in 1980 ,______.
A Ronald Reagan to rest at home B Washington worked as a consultant for companies C Margaret had lost her temper D Jimmy Carter has taught law at Emory University in Atlanta E we had been searching for a better job
5 . Based on this study ,______.
A the researchers tried to find out the ancient Egyptian writings B it ' s a resort city in Mediterranean C there are the newest types of bacteria D several conclusions could be made by the scientist E everyone enjoys this mild climate
6 . Unlike a box kite , a flat kite needs a tail to supply drag _____ .
A what happens almost everyday B and to keep it pointed toward the sky C who makes one consisting of Cloth Strips tied end to end