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D)provided 75. A)for Bto cby 76. A)before B)since C) when D)while 77. A)collected B) c) discovered 78. A)by B)of D) 79 A)amount B)av D)number 80. A)significant B)heavy C)common D)serious 81. A)For B)On B)inspire C)engage D)command 83. A)include B)confine C)imply 84.A)enjoyable B)stimulating D)stressful 85. A)wh B)what C) whichD) provided 75. A) for B) to C) by D) through 76. A) before B) since C) when D) while 77. A) collected B) conducted C) discovered D) published 78. A) by B) of C) with D) in 79. A) amount B) average C) sum D) number 80. A) significant B) heavy C) common D) serious 81. A) For B) On C) But D) So 82. A) require B) inspire C) engage D) command 83. A) include B) confine C) imply D) contain 84. A) enjoyable B) stimulating C) tedious D) stressful 85. A) who B) what C) which
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