2. 外语
  3. If a better material______, the strength of the part would have been increased.

If a better material______, the strength of the part would have been increased.

admin2007-10-13  55
问题 If a better material______, the strength of the part would have been increased.
选项 A、had been used
B、had been using
C、being used
D、using
答案A
解析 本题测试虚拟语气的用法。本句的意思是：“如果用了更好的材料，这一部分的强度就会增加。”表示对过去的虚拟，从句一般用过去完成时，主句用“would have done...”，本句要用被动语态。因此，A为正确答案。
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