Sue和Lin在地铁站，她们打算去科学博物馆。请你根据路线图补全短文。

Sue and Lin are at the subway station. First, they should at the shopping mall. Then they should , and pay attention to the traffic lights at the . Then they should and wait at the red light. And go straight. Then they will see the science museum the supermarket. When they go back to the subway station, they should at the shopping mall. It's also a good way to travel around the city subway.