题目内容

The students are too _____ to keep their eyes open in class because of staying up late.
A.sleepingB.asleepC.sleepD.sleepy
D

试题分析: 句意因为熬夜,学生们在课堂上困得睁不开眼了。Sleep睡觉,asleep醒着的,sleepy困的。Too.+adj+to...太......而不能......,固定句型,故选D。
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