2. 外语
  3. If the temperature of the furnace______200 degrees higher, meltdown would have occurred.

If the temperature of the furnace______200 degrees higher, meltdown would have occurred.

admin2012-08-05  25
问题 If the temperature of the furnace______200 degrees higher, meltdown would have occurred.
选项 A、was
B、had been
C、was being
D、had
答案B
解析
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