2. 专升本
  3. It was not until the subprime loan crisis (次贷危机)______ great damage to the American financial system that Americans______the sev

It was not until the subprime loan crisis (次贷危机)______ great damage to the American financial system that Americans______the sev

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问题 It was not until the subprime loan crisis (次贷危机)______ great damage to the American financial system that Americans______the severity of the situation.
选项 A、caused; realized
B、had caused; realized
C、caused; had realized
D、was causing; had realized
答案B
解析 考核时态的掌握。次贷危机发生在先，人们意识到金融体制在后，而且句子的时态是一般过去时故选择B。
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