【题目】Many students stay up late into the night, some of whom during the boring lecture.
A. drop off B. drop in
C. get away D. drop out
在线课程【答案】A
【解析】
考查动词短语。A. drop off睡着，减少，让-----下车；B. drop in顺便来访； C. get away离开，逃脱； D. drop out退出，退学。句意：许多学生熬夜到很晚，其中一些人在枯燥的课堂上打瞌睡。故选A。