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UnlikewatchingTV,readingisahighlyactiveprocessitrequiresattentionaswellasmemoryandimagination.[]A.untilB.butC.unlessD.for

题目详情
Unlike watching TV, reading is a highly active process________it requires attention as well as memory
and imagination.
[     ]
A. until  
B. but  
C. unless  
D. for
▼优质解答
答案和解析
D