2. 外语
  3. —What’s the matter? Why ______ —The signal is against us.

—What’s the matter? Why ______ —The signal is against us.

admin2008-11-13  47
问题 —What’s the matter? Why ______ —The signal is against us.
选项 A、the train stopping
B、does the train stop
C、is the train stopping
D、did the train stop
答案C
解析 用排除法。A、B、D都不对，D是过去时，而前面是现在时，所以后面的将来时态合适。
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