Simple past(quá khứ đơn) S + V2/ed + O + AP + AT  S + was/ were V3/ed ...+AP + (by O) + AT 1. They built the castle in the 14th century.  The castle ....................................................................... 2. People decorated the tree with lots of lights.  The tree............................................................................. 3. They sent greeting card to the children last week.  Greeting cards................................................................... 4. Mrs made a cake yesterday.  A cake .............................................................................. 5. People planted many tree along the street.  Many tree..........................................................................