______the 2008 Olympic Games will be held in Beijing has already been decided.

______the 2008 Olympic Games will be held in Beijing has already been decided.

题目
______the 2008 Olympic Games will be held in Beijing has already been decided.
A.Whenever
B.If
C.Whether
D.That
正解是D
请说明为什么C不能选,理由详细一点
答案
因为后面说的是has already been decided.所以前面必须是个肯定句才行,这样就不能选C了.如果选C后面应该是hasn't been decided.
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