1.cornered

adj. 有角的；被困得走投无路的

vt. 把…逼入绝境（corner的过去式）

仿In this sense, he was cornered as never before.

2.traipse

vi. 疲惫地走；闲荡；拖曳

n. 闲荡；漫步；无精打采者

vt. 在…游荡；走过

仿I traipsed all the way to the restaurant, only to find it was shut.

3.Summary

Gryffindors finished the class of repot Mandrakes and then went to the transfiguration class. Unfortunately, Harry forgot the last year what he had learned in the summer holiday and Ron behaved worse than harry because his wand was broken.Professor McGonagall was unpleased .