作業(yè)精靈老師示例：
1.
Sam: Excuse me, how do I get to the bookshop?
Policeman: Go along Tianjin Road and turn right at the traffic lights. Then, go along Beijing Road. Turn left at the second crossing, and you can see the bookshop on your left.
Sam: Thank you.
2.
Bobby: How do I get to the shopping centre?
Policeman: Go along Shanghai Street. The shopping centre is on your left.
Bobby: Thank you.
