2. 外语
  3. "The car ran out of gas!""That ______ the cause. I filled the tank this morning."

"The car ran out of gas!""That ______ the cause. I filled the tank this morning."

admin2011-02-26  57
问题 "The car ran out of gas!""That ______ the cause. I filled the tank this morning."
选项 A、mustn’t be
B、must have been
C、can be
D、can’t have been
答案D
解析
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