The main idea of paragraph 4 shows us______.
A. some examples of shooting in the US schools.
B. the American’s feeling.
C. some famous schools.
D. that some teachers were killed by students.
正确答案：A
43．答案为A第四段是校园枪击案的实例列举因此选A
Themainideaofparagraph4showsus______Asomeexamples
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