问题：
试题 题型：未知 难度等级：
That could set off a “credit event,” ______ world financial
That could set off a “credit event,” ______ world financial markets into turmoil（混乱）, much as the collapse(倒闭) of Lehman Brothers ______ in the fall of 2008.
A．threw；did
B．throwing；did
C．threw；had
D．throwing；had
试题 题型：未知 难度等级：
That could set off a “credit event,” ______ world financial
That could set off a “credit event,” ______ world financial markets into turmoil（混乱）, much as the collapse(倒闭) of Lehman Brothers ______ in the fall of 2008.
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参考答案：