第三节：完形填空（共20小题；每小题1.5分，满分30分）
I once had a teacher whose husband died of heart attack. About a week after his death, she ___21____some of her deep understanding with students. __22_the late afternoon sunlight came streaming in and the class was nearly __23__, she moved a few things aside on the edge of her___24__and sat down there.
