Ex.1
1. Did they come at 5 o'clock yesterday?
2. Did he go fishing last week?
3. Did they play hide-and-seek..?
4. Did she write a long letter..?
5. Did the children run..?
6. Did my brother read...?
7. Did Helen clean..?
8. Did mother visit London.?
9. Did they build...?
10. Did Mark begin...?
Ex.2
1. Who cooked salad last week?
2. Who flew to NY..?
3. Who went shopping..?
4. Who checked...?
5. Who helped..?