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1. Show some pictures and present the new words.
2. Read aloud the new words.
dig
serious
breadfruit
reduce
turn off
recycle
cause
wise
vt. & vi. 挖（洞，沟等）
adj. 认真的，严肃的
n. 面包树果实
vt. & vi. 减少，降低
关上（开关）
vt. 回收利用，循环利用
vt. 导致；造成
adj. 明智的，充满智慧的
Step 3 Learn the conversation
1. Listen to the tape and ask:
1) What is Hobo going to do?
2) Will more trees be planted this year?
3) What does Eddie like doing?
4) What will Eddie plant?
2. Act out the conversation.
Step 4 Practice
1. Do Part A on page 117.
2. Check the answers.
Step 5 Listen and answer
1. Listen to part B and answer the following questions.