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Years ago we didn’ t know this, but recent science _________ that people who don
Years ago we didn’ t know this, but recent science _________ that people who don
游客
2023-10-16
16
管理
问题
Years ago we didn’ t know this, but recent science _________ that people who don’ t sleep well soon get ill.
选项
A、showed
B、has shown
C、will show
D、is showing
答案
B
解析
本题可利用时态标志解题。本句的时态标志为Years ago和recent, 虽然“以前不知道”,但“现在已经证明了”,所以用现在完成时。因此B项符合题意。句意:几年前,我们还不知道这一点,但最近的科学表明,睡眠不好的人很快就会生病,故选B。
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