根据上下文选择正确的选项填空。

Bob is an American boy. He's 1 years old.Now he is in China 2 his grandma. He studies in a middle school. There are twelve boys and twenty girls in his 3. Bob has a good friend. His 4 is Jack. Jack can speak Chinese very well. However（然而），Bob can't. So Jack often helps Bob. Both Bob and Jack like5. They often borrow（借） books from their school library. They like China.