这两句话哪句是对的?1.These three rooms ought to be kept clean by you.2.These three rooms ought to have been kept clean by you.为什么?或者有更好的说法?

这两句话哪句是对的?1.These three rooms ought to be kept clean by you.2.These three rooms ought to have been kept clean by you.为什么?或者有更好的说法? that throat than these th的发音 the second letter answers the each of these points directly 这句话是对的吗 1.These are nice pictures.2.This is a middle school.把这两句话改为疑问句并作简要的肯定和否定回答. I have put on weight because I'm eating too much these days.这句话为什么对的 Are these children's ice creams?Are these ice creams the children's?哩两句话都是正确的吗? 中译英,快翻译：1.因为运动对人有益.2.因为它对眼睛有害.这两句话.注意：这两句话不是连的,没有任何相关. 请问这两句话的含义有什么不同?lt is at the 42nd street and 15th avenue crossing.与it is at the crossroads of 42nd street and 5th avenue. 两对相对性状分别由两对遗传因子控制 为什么这句话是错的? 相等的圆心角所对的弧相等./相等的两条弦所对的圆心角相等.1.相等的圆心角所对的弧相等.2.相等的两条弦所对的圆心角相等.这两句话哪句是对的? i have no exception还是i am no exception这两句话,哪句是对的? are these your pens?这句话的同意句是什么? whose hair clipare these 这句话的同义句 how does these happen 这句话的中文意思是什么 My birthday is November 11th. The school trip is September 26th. 这两句话中,日期前面要加on吗? 这两句话是对还是错? These are (our) apples.对（）部分提问 Th bike is old.改为一般疑问句 请问这句话语法对吗?Both of these English-Chinese dictionaries are not mineBoth of these English-Chinese dictionaries are not mine请补充回答:如果语法没问题,是不是翻译成:这两本英汉字典并不都是我的.