The rooms at（at） CNY138 138元的房间 是用at 还是of

The rooms at（at） CNY138 138元的房间 是用at 还是of 是at the starting of 还是at the start of 是at the beginning of 还是at beginning of ( )he clean the rooms at home.( )里是填Does还是Is 是“at the weekends"还是“at weekends"? at risk of 还是at the risk of 为什么 问几个英语的问题,是at supermarket还是at the supermarket,是at grocery sto 是at the weekend 还是用in?还是其他的~ 在一年的这个时候是译成at this time of a year还是at this time of year 还是at the two rooms are -----the same size.a.at b.for c.on d.of ...At the hands of ...这里是怎么用的? 一只鸟站在房子的顶部.翻译成英语.是用at the top of还是on the top of?