问题描述：
48.I was studying for the English__ at this time yesterday.49.Every night they hear a strange__out
接side their window.50.i bought a red__ for my mother.
48有4个字母,第3个字母是s
49有5个,第四个是s
50有6个,第5格是s
接side their window.50.i bought a red__ for my mother.
48有4个字母,第3个字母是s
49有5个,第四个是s
50有6个,第5格是s
问题解答：
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