buys
had bought
bought
2. Jane … when the telephone rang. *
was sleeping
sleeped
slept
3. By the time I came back, Mike and Jane , so I couldn't tell them about it. *
were already leaving
had already left
left
4. Christopher Columbus America in 1492. *
discovered
was discovering
had discovered
5. I you yesterday because my telephone was out of order. *
didn't call
didn't called
hadn't called
6. Yesterday I went to an interesting museum that I before. *
wasn't visiting
didn't visit
hadn't visited
7. I burned my finger while I breakfast. *
had cooked
cooked
was cooking
8. He ….with Mary, when Mrs. Smith came in. *
was talking
told
talked
9. She her homework by 7 o'clock. *
had done
was doing
did
10. He for his bus at the bus stop. *
had waited
wait
was waiting
11. What eat yesterday? *
were you eating
had you eaten
did you eat
12. What at this time yesterday? *
did she do
had she done
was she doing
1.Buys
2.slepeed
3.Left
4.Discarve
5.didn't called
6.wash't visiting
7.cooked
8.was talkend
9.was doing
10.wait
11 you were eating
12.did she do