They()cleaned()the()classroom()yesterday.()(请运用It()is/was()+()被强调部分()+()that的强调句型结构进行句型转换,强调时间状语yesterday)

--The day before yesterday I saw John at a party. A: Oh, are you free now? B: Yesterday was a fine day. C: Oh, I haven't seen him for a long time. D: We had a good time yesterday.

我昨天是在火车站遇到的黎明。 A: It was I who met Li Ming at the railway station yesterday. B: It was Li Ming who I met at the railway station yesterday. C: It was at the railway station that I met Li Ming yesterday. D: I was yesterday that I met Li Ming at the railway station.

sunrise

My mum said, "I read a book yesterday."→My mum said a book . A: I read; the day before B: she had read; yesterday C: she had read; the day before