单选题：A new technique （　　）, the yields as a whole increased by 20

  • 题目分类：公共英语四级
  • 题目类型：单选题
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题目内容：
A new technique （　　）, the yields as a whole increased by 20 per cent. A．working out
B．having worked out
C．having been worked out
D．to have been worked out

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Pick me up at 8 o'clock. I （　　）my bath by then.

Pick me up at 8 o'clock. I （　　）my bath by then.A．may have B．will be having C．can

分类：公共英语四级  题型：单选题
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Read the following text(s) and write an essay to 1) summariz

Read the following text(s) and write an essay to 1) summarize the main points o

分类：公共英语四级  题型：单选题
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