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课时作业(二十一) 必修5 Unit 1 Great scientists .单项填空 1．(2017·龙岩四校联考)—Would you like to join us in the game? —________，for I have something important to attend to. A．I will B．I’d love to C．I won’tD．I’m afraid not 2．(2017·沈阳六校联合诊断)As far as I know，Mark is a(n)________shopper who always does some careful research on the market before he buys something valuable. A．fortunateB．generous C．enthusiasticD．cautious 3．(2017·武汉名校调研)Finding information in today’s world is easy.The ________is how you can tell if the information you get is useful or not. A．knowledge B．ability C．competitionD．challenge 4．(2017·云南毕业班质检)After further studying those fossils，Dubois，a Swiss scientist，announced with________that the socalled “Java Man” was merely an extinct monkey. A．courageB．certainty C．anxietyD．relief 5．(2017·厦门毕业班适应性考试)Graduation，in________opinion of many students，is________time to thank those who helped them through. A．the；aB．the；/ C．a；aD．/；the | 
