I didn't think __ possible to learn French and English at the same time A.this B.that C.it D.it's
问题描述：
I didn't think __ possible to learn French and English at the same time A.this B.that C.it D.it's
答
it
做从句的形式主语我好像记得有一句话是 it is impossible to .......... 为什么这里填 it刚才打错了，不是做从句的主语这里是同位语从句，所以用it