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o to help. But when it rains, people cannot do it! Let’s read. There are some interesting old ways to send messages. Some people use smoke to show they need help. Their friends can see the smoke from far away, and they know there is a problem. Then they will go to help. But when it rains, people cannot do it! Let’s . Let’s read. 2 3 4 2 3 4 4 2 3 4 4 2 3 4 4 2 3 4 4 1 1 1 1 1 1 2 3 4 5 Let’s read. 3 4 3 4 4 3 4 4 3 4 4 3 4 4 A 1 2 3 4 5 2 2 2 2 2 Let’s read. 3 4 3 4 4 3 4 4 3 4 4 3 4 4 A 1 2 3 4 5 B C D Let’s read. 2 3 4 2 3 4 4 2 3 4 4 2 3 4 4 2 3 4 4