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Good technique in medicine means less pain and fewer deaths and, ________ it is our duty to master it.

[  ]

A.altogether

B.therefore

C.otherwise

D.however

答案:B
解析:

本题考查副词在语言环境中的意思.句中therefore在此处表示“因此”,与as a result, so意思相近.altogether表示“总的来说”,相当于on the whole; otherwise表示“否则”,相当于or; however用作副词表示“不管如何,然而”.从全句意思看应为B项.


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