2. 专升本
  3. The new technique______, the yields as a whole increased by 20 percent.

The new technique______, the yields as a whole increased by 20 percent.

admin2018-04-13  20
问题 The new technique______, the yields as a whole increased by 20 percent.
选项 A、working out
B、having worked out
C、having been worked out
D、to have been worked out
答案C
解析 work out所表示的动作发生在主句谓语动词之前，所以应用完成式。综上所述，选C。
转载请注明原文地址:https://kaotiyun.com/show/IlWC777K
本试题收录于： 英语题库普高专升本分类
0

英语

普高专升本

相关试题推荐
随机试题
最新回复(0)