1.The plumber repaired the pipe two days ago.
2.We heard a scream just now.
3.The secretary typed all the letters last week.
4.Your sister peeled the onions very quickly last night.
5.The doctor gave him an injection this morning.
6.Lina did not help her mother in the kitchen last Sunday.
7.Some rats ate up the bread on the table last night.
8.My sister turned off the tap an hour ago.