题目内容

I.Complete the sentences with the proper formsof the sameword.动手术，操作，开动(operate)He ____on the baby’s throat, and saved its life.

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动手术，操作，开动(operate)The lift is ____by electricity.

有礼貌,有教养 (polite)The ____of this machine is simple.

有礼貌,有教养 (polite)Bob ____stood aside and let the lady go through the doorway first.

有礼貌,有教养 (polite)The children from that school are known for their ____.