1.We only have PE class and computer class.class用复数吗?为什么?什么时
1.We only have PE class and computer class.class用复数吗?为什么?什么时候class加复数?
2.(我们上一天学,休息两天,)怎么翻译?
3.My mother tells me to go to home by ten o clock.这里为什么用by?不用at?
4.have to be in bed by ten oclock.为什么用be in bed ,
5.Do you have()选项:1a 2an 3the 4不填 dining hall in your school?为什么?