7-20 предложения !!! помогите пожалуйста past simple и past perfect !!! ПОЖАЛУЙСТА!

большое спасибо, вот прям очень большое❤❤❤❤❤

1 Tom returned from the cinema at five o'clock 2 Tom had returned from the cinema by five o'clock 3 I finished my homework at seven o'clock 4 I had finished my homework by seven o'clock 5 He thought that he had lost the money6 Ann told me that she had seen an interesting film7 When I came home mother had already cooked dinner 8 When father returned from work, we had already done our homework 9 When the teacher entered the classroom, the pupils had already opened their books10 Kate gave me the book which she had bought the day before 11 Nick showed the teacher the picture which he had drawn12 The boy gave the goats the grass wich he had brought from the field 13 Mother saw that Nick hadn't washed his hands14 The teacher understood that Lena hadn't done her homework 15 I knew that my friend hadn't come yet16 When I woke up yesterday, father had already gone to work 17 Nick though that his father hadn't come yet18 Mary told us that she had cooked a good dinner 19 Yesterday I found the book which I had lost in summer 20 When we came to the station, the train had already left