1.If we compare today's China ___ yesterday's China,we'll se

1.If we compare today's China ___ yesterday's China,we'll see what a change we've had.
A)in B)for C)with D)as
2.Early.in the morning he opened all the windows ___in fresh air.
A) so as to letting B) as so to let C) as to so let D) so as to let
3.This is a house____on an ancient European.pattern.:
A)building B) built C)be building D)to build
最好可以带有解释,