To test eggs , them in a bowl of water: if they float they are bad; if they sink they are good.
A. put
B. putting
C. to put
D. to be putting
网友回答
(答案→)A. put
B. putting
C. to put
D. to be putting
解析：句子所要表达的意思是，检测鸡蛋，要把它们放在一碗水中，如果它们浮起来就是坏的，如果它们沉下去就是好的。把它们放在一碗水中是祈使句，应该用动词原形，故选A