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in B. on C. at ( ) 3. I want ________ a scientist in the future. A. be B. an C. to be ( ) 4. I want to be a __________. A. sings B. singer C. sing ( ) 5. — ________ — I want to be a doctor. A. What are you want to be in the future? B. How are you going to be in the future? C. What do you want to be in the future? 四 、 選出表達正確的句子 。 We are talking about our __________. 3. 它很難實現(xiàn)。 Sunday, September 27th Today I went to see my pen friend in Xi’an. We had talk for a long time. How happy we were! He’s from Beijing. His