I want to be a doctor.Doctors_____greatly in every paty of the world .I think.

问题描述:

I want to be a doctor.Doctors_____greatly in every paty of the world .I think.
A need B are needed C are needing D will need

选B
根据题意理解,要表达的意思是“医生们在世界各地都极度被需要.”,所以应该用被动语态.