1.Hide-and-seek is such a popular game ______ is played among children all over the world.

问题描述:

1.Hide-and-seek is such a popular game ______ is played among children all over the world.
A.as B.that C.what D.
which
为什么选A

选A ,是为了与such在语法上取得一致.如果没有such,答案就是that / which了.
共同点就是,as / which / that都做从句部分的主语.