题目内容
The psychologial improvements of _____ Facebook suggest that people may be using the social network more than they should.
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Did you ever have _____ on one of the jocks when you were at school or have you fallen in love with someone at first sight?
AI long ago mastered chess, the Chinese board game Go and even the Rubik’s Cube, ___ in just 0. 38 seconds.
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The ___ of the whole operation has been jeopardized by one careless resident doctor who left a piece of gauze in the patient’s body.
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