4. Put the verb into the most suitable form, the Past Perfect or the Past Indefinite...

Question

4. Put the verb into the most suitable form, the Past Perfect or the Past Indefinite Tease.

Поставьте глагол в Past Perfect или Past Indefinite.

1. I (to give) him the book his teacher (to recommend). 2. Tom wasn't there when I (to arrive). He just (to leave) home. 3. By the time they (to arrive) the film (to finish). 4. He knew that he (to make) a serious mistake. 5. I felt that I (to meet) this man somewhere before. 6. By two o’clock Ann (to ask) all the students.

Answer 1

1.I gave him the book his teacher had recommended.
2. Tom wasn't there when I arrived. He had just left.
3. By the time they arrived the film had already finished.
4. He knew that he had made a serious mistake.( не точно ) 
5. I felt that I had met this man somewhere before.
6. By two o'clock Ann had asked all the students.( не уверена )