Saying Goodbye Many people were waiting for the train．Some were reading newspapers and some were saying goodbye to their friends

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问题 Saying Goodbye
Many people were waiting for the train．Some were reading newspapers and some were
saying goodbye to their friends．
Doctor Smith，Mr．Lee and Mr．Brown were talking so happily that 16Then the
guard called loudly，“The train is going to leave． 17 ”The three men heard the guard and
two of them jumped onto the train quickly before it moved.One was left behind.It was Dr．
Smith．He18The guard came to him and said，“Don’t worry．19”“I know．”Dr Smith said，“20My friends only came to say goodbye to me．”