(安徽安庆2009教学质量监测)In preparation for the launching of Shenzhou VII, 4、scientists need knowledge of weather changes.
A. the; the
B. a; /
C. /; a
D. the; a
网友回答
A. the; the
B. a; /
(答案→)C. /; a
D. the; a
解析:考察冠词,In preparation for是固定搭配,第二空后的knowledge指具体的一门知识的时候是可数名词,所以选C项。