Mr. Obama noted that the Christmas Day bombing was not the first time the group to attack

发布时间：2020-08-16 09:55:36

Mr. Obama noted that the      Christmas Day bombing was not the first time the group     to attack America and its friends.
A. advised; tried
B. attended; trying
C. attempted; had tried
D. wanted; has tried

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A. advised; tried
B. attended; trying
(答案→)C. attempted; had tried
D. wanted; has tried
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