They are so diligent in their study that they ______ their sleep

They are so diligent in their study that they ______ their sleep and meals.
A、look down upon
B、neglect
C、paid attention to
D、gratify
【正确答案】：B
【题目解析】：本题考查词组和动词词义辨析。A.look down upon：看不起；B.neglect:忽视，忽略；C.pay attention to：注意，留心；D.gratify：使满足，使高兴。根据题意，“他们是如此勤奋地学习以至于他们都忽略了睡觉和吃饭。"B最符合题意。答案为B。