10春学期《大学英语(一)》在线作业1-3

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10春学期《大学英语(一)》在线作业一
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% _- S% a6 y2 T0 M 单选题  
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" i# \0 I3 E1 w5 W1 P# ]一、单选题（共 10 道试题，共 100 分。）V
1.  How can you convince him__A___ the death of his wife, since he was with her a few minutes ago?
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B. on
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5 E8 {9 M8 T' }! a2 W; o& J: P: E      满分：10  分