They decided to work harder and         more effort after their failure.

  • A.put in
  • B.putted in
  • C.put on
  • D.be put in

答案

正确答案:A

知识点:实义动词用法  

解题思路

put in more/a lot of effort意思是“投入更多/许多精力”。此题中,and连接的前面短语需保持一致,所以put用原形。故选A。

易错点

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