完成句子

11．He was so excited that l couldn't make him   _____    (平静下来)．

12. We are all  _________ (相处得很好) each other in our class．

13．She    _____ (为．．．．担忧)her son's future．

14．There has been  ________ (一系列)cars accidents at the crossing．

15．Filling the blanks  ________ (根据)what I have said．

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