判断题：一个草履虫就是一个细胞，因此还不是一个完整的生物。
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A. The boy is going to the park.
B. Some newspapers are flying away.
C. The balloons are flying away.
D. These boys are playing football.
E. They are going to go to the park tomorrow.
修改下列病句。
①我和妈妈向您表示深深的感动。
②我们学校有学生将近1800人左右。
下列物质中，不属于合金的是（ ）
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