(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
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| (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. |
答案
| D |
解析
| 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。 |
举一反三
He______ his work, otherwise, he wouldn’t be enjoying himself by the seaside.| A．must have completed | B．should have completed | | C．ought to complete | D．must complete |
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—What do you think we can do for our aged parents?
—You ____ do anything except to be with them and be yourself.| A．oughtn’t to | B．don’t have to | C．mustn’t | D．can’t |
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Tom’s score on the test is the highest in the class. He _____.| A．should study last night | B．should have studied last night | | C．must have studied last night | D．must study last night |
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—Sure，________.| A．I did | B．I do | C．I shall | D．I will |
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