Tom looked upon the test as an obstacle his classmates regarded it as a challenge.A. whil

发布时间：2020-08-17 04:02:09

Tom looked upon the test as an obstacle      his classmates regarded it as a challenge.
A. while
B. because
C. unless
D. if

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(答案→)A. while
B. because
C. unless
D. if
解析：句意：汤姆把测试看成是障碍而其他的同学把它看成是一种挑战。While可以表示前后是对比关系；because因为；unless除非；if如果。根据句意故选A。
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