1, Yesterday, I went to the zoo with my friends. (go)
2, On her birthday, we sang the song called "Happy birthday". (sing)
3, In the past, I always woke you up. (wake)
4, My friends flew to Japan last month. (fly)
5, She was unhappy because of her bad marks. (is)
6, My lessons began at 7 o'clock. (begin)
7, They built this building two years ago. (build)
8, She bought me a teddy bear. (buy)
9, He left me without saying a word. (leaves)
10, I did my homework with him. (do)