补全短文

Pain is the most common reason we go to a doctor. It is the most common reason we take medicines. Until recently, however, most doctors knew of only a few drugs that stopped some pains. ________. But new knowledge about the process of pain is helping them to control pain better.

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6-12岁英语高频重点词汇，搞定小学英语全段考试

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A、Yet we need pain.

B、They knew little about the process of pain itself.

C、And others have painful attacks all the time.

D、It is our body's Warning system.

【正确答案】 B

【答案解析】 空句所在的段落主要讲的是治疗疼痛的发展，许多医生只知道少量可以治疗一些疼痛的药物，这是由于缺乏对疼痛过程的认识。此处前后process也是对应词。

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