填空题

______(新技术研制出之后) , the yields as a whole increased by 20 per cent.

【参考答案】

Anewtechniquehavingbeenworkedout/Afteranewtechniquehasbeenwo......

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填空题
D
单项选择题
A．David is going to fly to New York.B．David will stay in New York.C．David went to Iraq the other day.D．David is going to leave for Iraq next week.
A．David is going to fly to New York.
B．David will stay in New York.
C．David went to Iraq the other day.
D．David is going to leave for Iraq next week.
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