对话连线
(1) How long is the Great Wall? a. They go to the Great Wall by bus.
(2) How do they go to the Great Wall ? b. Danny feels tried and hungry.
(3) How does Danny feel on the way back? c. About 6000 kilometers.
(4) Danny ! stop ! d. Don’t be afraid. I can help you.
(5) help! e. There are many cars and buses.