I. 1. She gave some flowers to the teacher last month.
2. They left the room once.
3. The wind blew hard two nights ago.
4. She wrote a letter to her mother a decade ago.
5. He understood everything last class.
6. She made a lot of mistakes in her last composition.
II. 1. My son didn't play with his friends in the yard this morning.
2. My daughter didn't do her homework last night.
3. He didn't get the train at this station yesterday.
III. 1. Did I miss the train?
2. Did you go to NY last year?
3. Did we lose our money yesterday morning?
4. Did they use their intelligence to solve the problem last class?