题目内容
( ) 9. After the countryside,Yuan Longping began to devote himself to the research
into the rice harvest for the local farmers.
A. settling up B. settling down C. settling on D. settling in
9. D考查动词词组的用法。settle up结账,还清欠款;settle down安居,安定(不及物) ;settle on 决定,选定;settle in在某地安顿下来。句意:在乡村安定下来之后,袁隆平开始全身心地投入到为当地农民提高水稻产量的研究中。
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