{01}___________you try to do something beyond what you have already mastered, you will never grow.
A.Since
B.When
C.Though
D.Unless
解析: 试题分析:A.Since 自从,因为,B.When 当…时候,C Though虽然,D.Unless除非,如果不,相当于if not…句意:如果你不努力做超出你已经掌握的东西,你永远不会成长。根据句意选D。 本题选D。 {02} There is hard evidence ________ George has something to do with the murder.
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