题目内容：
Don’t use water to put out the fire if oil catches fire. As is known, oil ____ float on water.A．shallB．mustC．mayD．will
参考答案：
单选题：Don’t use water to put out the fire if oil catches fire. A..
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________ you interrupt now? Can’t you see I’m on the phon..
________ you interrupt now? Can’t you see I’m on the phone?_ Sorry, Sir, but it’s urgent.A．Can B．ShouldC．MustD．Would
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They urge the local government that the problem ________ as soon as possible.A．handlesB．could be handledC．must be handledD．be handled
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