exercise book的复数形式怎么拼写

exercise book的音标：exercise book的英式发音音标为：['eksə buk]exercise book的美式发音音标为：['ɛksɚˌsaɪz bʊk]...

n.练习本...

The boy went to the teacher and gave him the exercise - book .男孩走到老师那里,把 作业本 交给他.Little Gauss wrote the number in his exercise - book .小高斯在 作业本 上写下答案.Well, hand me your exercise - book.“那把你的本子交上来. ”...