You have failed two tests.You"d better start working harder, ________you won"t p
题型：不详难度：来源：
| You have failed two tests.You"d better start working harder, ________you won"t pass the course. |
答案
| D |
解析
| 考查“祈使句＋and/or＋陈述句”。因为祈使句与后面的陈述句所表达的内容是对立的关系，故用or(否则)。 |
举一反三
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There is still much to discuss；________，we shall return to this topic at the next meeting.| A．yet | B．therefore | | C．otherwise | D．however |
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| It"s really very dangerous.One more step，________ the baby will fall into the well. |
| Information technology is taught in most schools，________ we have entered the information era. |
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