He is one of the most excellent students in our class and he always himself in his studi

问题补充：

He is one of the most excellent students in our class, and he always himself in his studies.

A. buries

B. hides

C. covers

D. leaves

答案：

(答案→)A. buries

B. hides

C. covers

D. leaves

解析：考查动词辨析，A. buries沉溺于B. hides隐藏C. covers覆盖D. leaves离开，固定词组bury oneself in sth意思“沉溺于某物”，句意“他是我们班最优秀的学生，他总是沉溺于学习”