用absent,absence和noise,noisy造两个句.absent和absence在一个句子里,noise和noisy也在一个句子里.

Don`t be absent from class because your absence will miss a lot of knowelege.
The noise in a nosiy environment can cause disease.

The absence of the class teacher made many students absent from school班主任不在学校,所以很多学生上学旷课The moises made by the noisy students almost drove me mad.那些吵闹的学生发出的噪音简直是我发狂....