Номер 3, помогите пожалуйста!!!!

3. Choose the correct variant.

I) She said that she ... home early. b) would be

2) He said that he ... her for several years. a) had known

3) Yesterday the teacher told us that the sun ... rather a small star. b) is

4) Father said that they ... television when they heard the news. a) were watching

5) I thought that they ... in a month. a) would return