问题
选择题
(2013·安徽师大附中高三七模)Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.
A．shall
B．must
C．may
D．will
答案
答案：D
D 句意：如果油着火了不要用水来灭火，我们都知道油会浮在水的上面。will用于陈述真理性的事实。
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