she lost an English book whose cover is dark blue.
he has a pen friend who he has never seen .
this is the way of life (to) which she is looking forward to .这里的to放which前或forward后都可以.
she lost an English book whose cover is dark blue.
he has a pen friend who he has never seen .
this is the way of life (to) which she is looking forward to .这里的to放which前或forward后都可以.