Unit1ReadingUnit1ReadingIt’snotaproblem–it’sachallenge.Enjoyfacingit.Whoisthis?ItisStephenHawking–agreatscientist.What’swrongwithhim?Hecan’twalkorevenspeak.Oh!Itisabigproblemtohim.Section1Section1deal(v.)unless(conj.)unfair(adj.)affected(adj.)solve(v.)challenge(n.)regard(v.)smart(adj.)duty(n.)instead(adv.)HOMEHOMEUsingDictionariesUsingDictionaries词典是有用的学习工具,但是许多英语单词有很...