There are twenty classes at our school.一本练习上是at 可为什么是at是不是题目错了

there are twenty-five是什么意思? there are twenty desks in our classroom.对twenty提问 there are twenty -four ---in a day There are twenty（）in our classroom. there are twenty of them.怎么翻译? There are still twenty minutes left. 英语翻译There are ( ) twenty kinds of ( ) in Sun Zoo. There are only twenty _eight or twenty_nine day in F____ There are twenty-six___(字母）in English. There are twenty -four _______in a day .填空 There are twenty boys in ben class哪里错了 there are twenty-six l_____ in zhe english alphabet How many shoes are there in twenty-six pairs? there are (twenty) boys in class 3.括号提问 英语题,There are twenty man doctors in the hospital. There are twenty ( ) A women teachers B woman teachers There are twenty chairsin our classroom的同义句 There are twenty two girls in the classroom哪儿错