Sincethe1980s,thescientistshavedevotedthemselvestother...

问题详情：

 Since the 1980s, the scientists have devoted themselves to the research _______ finding a new cure for the disease. 

    A. setting foot in       B. ended up with         C. starting with              D. aimed at

【回答】

D

知识点：动词

题型：选择题