阅读理解。 Hi, I'm Wu Dong. This is my classroom. There is a map of China on the wall. There are fifty desks in it. One of them is the teacher's. I'm No. 2 in Row 3. I sit behind Li Lei. On my desk there are some English books and a pencil-box. My English is not very good. Jim helps me with my English. 根据短文内容， 判断下列句子的正(T)、误(F)。 (     )1. This is Wu Dong's bedroom. (     )2. A map of China is on the wall. (     )3. There are forty desks in the classroom. (     )4. Wu Dong sits behind Li Lei. (     )5. Wu Dong's English is good.