问题

When we start gazing into the night sky with a telescope, soon we’ll be astonished by the realization _______ we and our world are part of this giant system.

A:which
B:whether
C:that
D:as

正确答案是：

同类题型

Not until all the fish died in the river, _______ how serious the pollution is.[ ]

a fire, hotel guests are asked to remain calm

I believe you will have a wonderful time here you get to know everyone else.

How did you _____ the movie last night? –Oh, both interesting and instructive.

Have you seen the notice _________ the wall— Yes, I have.