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American International Group was the largest insurance company in the US____ it suddenly closed
down in September 2008.

A. after
B. since
C. as
D. before
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科目:高中英語 來源:廣西自治區(qū)模擬題 題型:單選題

American International Group was the largest insurance company in the US____ it suddenly closed
down in September 2008.
[     ]
A. after
B. since
C. as
D. before

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