问题
选择题
She was very hardworking ________he was very lazy. As a result,she passed the examination,but
he failed. [ ]
A. when
B. since
C. while
D. as
答案
答案：C
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She was very hardworking ________he was very lazy. As a result,she passed the examination,but
he failed. [ ]
A. when
B. since
C. while
D. as
答案：C