问题
选择题
To test eggs, _______ them in a bowl of water: if they float they’re bad, if they sink they’re good.
A．put
B．putting
C．to put
D．to be putting
答案
答案：A
A。句首的 to test eggs 为目的状语，填空句为祈使句谓语，故要用动词原形。
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