Leggi le frasi e indica se sono al PAST SIMPLE o al PRESENT PERFECT.
1 I went to America last year. 2 I've been to America twice. 3 I took my grandma some books on Sunday. She's not very well. 4 I have taken my grandma lots of books since she broke her leg. 5 I ate my lunch at the park near the library on Saturday afternoon. 6 I haven't eaten my lunch yet. I've been too busy at the library. 7 I studied for my science test yesterday, then I went to the park. 8 I've already studied for my science test. I'm going to the park now.