a. most cleanest b. cleanest c. more cleanest d. cleaner → b 175. Mathematics is ……………… and serves so many of the sciences that it is a prerequisite for studying every scientific discipline. a. such important field b. such an important field c. such a important field d. so an important field → b 176. Studies of job satisfaction are unreliable because there ……………. so many variables and because the admission of dissatisfaction may be viewed as a personal failure. a. was b. were c. is d. are → d 177. I knew I could rely ……………… them to get the job done. a. in b. with c. of d. on → d 178. Champlain founded a base at port royal in 1605, and …………. a fort at Quebec three years later. a. builds b. built c. to built d. building → b 179. Natural gas often occurs together …………… petroleum in the minute pores of rocks such as sandstone and limestone. a. with b. in c. by d. along → a 180. There is no limit to the diversity to be ……………. in the cultures of people throughout the world. a. finding b. found c. find d. to find → b 181. We were very proud of his …………… a. fearful b. fearfulness c. fearless d. fearlessness → d 182. The Sloths spend most of …………… time hanging upside down from trees and feeding on leaves and fruit. a. its b. his c. her d. their → d 183. The native people in the Americas were referred to as Indians because according to the ………… at the time, Christopher Columbus had reached the East Indies. a. believe b. belief c. believed d. believer → b 184. …………… missile was used in the war between American and Irak. a. Guidance b. Guide c. Guided d. Guideless → c 185. A barometer is a device with a sealed metal chamber designed ……………… the changes in the pressure of air in the atmosphere. a. to reading b. read c. reading d. to read → d 186. Cotton fiber, like other vegetable fibers, ……………. composed mostly of cellulose. a. are b. is c. has d. have → b 187. Almost all life depends ………. chemical reactions with oxygen to produce energy. a. with b. to c. on d. for → c 188. It may be argued that modern presidents have far ……………. responsibilities than their predecessors did. a. great b. more great c. greater d. most great → c 189. She put a (well-) …………… case for increasing the fees. a. reason b. reasoned c. reasonable d. reasonably → b 190. Many grasshoppers can produce sounds by ……………. their hind legs against their wings. a. rub b. to rub c. rubbed d. rubbing → d 191. Henry Wadsworth Longfellow was not only a poet and an author but ……… the chairman of the modern language department at Harvard university for more than eighteen years. a. also b. as well c. so well d. so