动词时态及语态题(客观真理要用一般现在时)
1、The manager told us that this factory was built in 1958.
2、By the time we got there， the play had already begun.
3、When I was a child， I knew that the earth turns about its axis.
4、When Mr.Delay got home after a day‘s exhausting work， his wife and children were sleeping.
