who is the girl （that）is crying.为什么不能用which?

who is the girl （that）is crying.为什么不能用which? the city which she lives in is far away 为什么which不能用that? the pen that you want is on the desk 能不能用which 为什么 She is not the cheerfuf girl that she was.为什么只能用that引导,而不能用w 二、 选择填空：( )1.Look!Who is that girl?Which one?The girl ____ r Thw knife___we cut the bread is very sharp.为什么不能用that或which? Which is that girl. ‘who is that girl Who is that girl? whose/who/which/what child is that girl?选哪个 whose\who\which\what child is that girl who is that girl ? which one ? The one with long hair .with