Professor Backman took up scientific research for decades.and this is he devoted
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Professor Backman took up scientificresearch for decades，and this is________he devoted all his life to.
| A．which | B．what |
| C．where | D．how |
试题答案
【答案】
B
【解析】这题考查名词性从句，选 B。what 引导表语从句，并在从句中作介词 to 的宾语。句意是：巴克曼教授了科学研究几十年来，这是他奉献一生做的事。