摘要：(A) Washington--- “A father killed his three children and a family friend and injured his wife before killing himself in the southeast US city of Miami; it was reported on Sunday. Police said they didn’t know why the father, William Gutierrez, went mad in his own house. He shot each of the children, aged five, four and one, in the head and killed the friend with a shot to the chest. His wife, Maguey Diaz, was shot in the arm. She was treated at a nearby hospital and released. the report said.51. According to the news report, William Gutierrez killed people in all. A. three B. four C. five D. six

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