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s mouth, the vet told him. How do I do that ? he asked. Carefully, replied the vet. 。s job Zookeeping isn39。 May I…… 表示一種委婉的請求。 could是 can的過去式,它也可以表示一種委婉的問話。s an engineer. A: What might you want to do in the future? B: I might like to be a fireman A:Why? B: I like the idea of helping people. I also like the truck fireman drive. It could be an exciting job. 3, Read and answer the following questions inyour book Questions : 1 What were David and his family watching? 2 What was David39。Unit 12