问题
选择题
The first thing ________ I did was to see if there were any products ________ might help me, but there only seemed to be powders ________ to kill snakes.
A．that; /; designed
B．which; that; designed
C．/; that; designed
D．/; which; design
答案
答案：C
考查定语从句和分词用法。第一空省略that/which, that/which指代先行词the first thing作为did的宾语；第二空that指代any products在句中做主语，不能省略。Design与powders构成被动关系，所以使用过去分词。