《If I start after dinner I'll finish it before I go to bed》Problems PPT课件2
《If I start after dinner I'll finish it before I go to bed》Problems PPT课件2第3页

Words and expressions

schoolwork volunteer necessary shame instead instead of

n. 学生课业;功课 n. 志愿者 v. 自愿 adj. 必要的;必需的 n. 可惜;遗憾 adv. 代替;而不是 而不是