Ответ:

1) I thought of my girl friend yesterday.

2) I thought of my birthday party last week.

3) I thought of pancakes 2 hours ago.

4) I thought of my elder brother last weekend.

5) I thought of you hour ago.

6) I thought of my future yesterday.

7) I thought of book which I want to buy.

8) I thought of a restaurant in which we go.

9) I thought of my dead grandmom 3days ago.

10) I thought of little girl which I meat yesterday.

Вроде бы справился, ну и задачку поставил ты мне дружок.