问题描述：
根据句子提示,用适当字母填空
51.school is【 】.we can go home
52.they are【 】workers
53.now calss begins.【 】talking
54.i saw him go【 】the classroom
55.the【 】says it will rain tomorrow
51.school is【 】.we can go home
52.they are【 】workers
53.now calss begins.【 】talking
54.i saw him go【 】the classroom
55.the【 】says it will rain tomorrow
问题解答：
我来补答展开全文阅读