1._____is really hard_____them to climb mount tai A.this,to

題目：

1._____is really hard_____them to climb mount tai A.this,to B.it,for C.this,for D.it,to
需要理由

解答：

.__It___is really hard__for___them to climb mount tai
答案選B,it is hard for sb to do ,對某人來說做某事很難是固定搭配