2. 外语
  3. "I bought this computer for $500 last week." "It’s on sale this week for only $400. You should have waited." "Oh, really?

"I bought this computer for $500 last week." "It’s on sale this week for only $400. You should have waited." "Oh, really?

admin2010-03-19  49
问题 "I bought this computer for $500 last week."    "It’s on sale this week for only $400. You should have waited."    "Oh, really? But how ______ I know?"
选项 A、can
B、will
C、do
D、would
答案D
解析 这里是虚拟语气，表示当时怎会知道。当然，如果用would I have known的动词时态，可能会更符合语法的规范。但是没有提供该选项。那就只能选择最接近正确的时态。
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