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1 . Researchers claim ________ the first proof that getting a regular eight-hour sleep every night makes a real difference to our health.
| A．finding | B．having found |
| C．to find | D．to have found |
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2019-08-09更新
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3卷引用：重庆市第八中学校2021-2022学年高一下学期第二次月考英语试题
