选择正确的选项和语法进行填空。 I am an American boy, I came to China two years ago. I 1 here for two years. My father often 2 me 3 football on the playground. Last week I 4 to the park by him. We saw a lot of monkeys 5 in the tree. I heard a voice from behind. When I 6 along the river. I thought myself. “It must 7 Mr. Brown. He 8 photos.” We 9 that day. We 10 back to America next week.