John wants to be a so he often helps sick people in the hospital.A. reporterB. doctorC. s

问题补充：

John wants to be a, so he often helps sick people in the hospital.

A. reporter

B. doctor

C. scientist

D. cook

答案：

A. reporter

(答案→)B. doctor

C. scientist

D. cook

解析：本题考查名词的词义。reporter“记者”；doctor“医生”；scientist“科学家”；cook“厨师”。句意为“约翰想要成为一名医生，所有他常常在医院帮助病人”。故选B。

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