写出下面单词前两个字母组合起来发出的读音相同的单词：why who thin this

/w/：what ,why,when,where,whether,white,whatever；
/h/：who；whoever；whole；whose；wholesaler；th读[θ],如theatre,thief,thousand,Thursday,thank,think,throw,thick,thin,thankful,three,third,thirteen,thirty,thing,through,throughout指示代词this,that,these,those；人称代词they,that,these,those；人称代词they,them,themselves,their,theirs；副词then,there；连词than,though和定冠词the中的th读[ð],连词through,throughout例外.