First the rice by washing it, then it in boiling water.
A. prepare, cook
B. preparing, cooking
C. preparing, cook
D. prepare, cooking
网友回答
(答案→)A. prepare, cook
B. preparing, cooking
C. preparing, cook
D. prepare, cooking
解析：考查祈使句。祈使句以动词原形开头，排除B、C；第二空也是祈使句。故选A。