请教几个语法题，非常的感谢[大家论坛-大家学习网论坛]

红色的都是正确答案，但是本人确实不知为什么会是这些答案，请高手指点一下。谢谢。

Mediators were standing by, prepared to intervene in the labor dispute even both sides had refused earlier offers for assistance.

Quincy took Dan to Derek’s home for a visit, never imagining that five years would pass before seeing Derek again.

When the Berlin Wall, long a symbol of the Cold War, began to be torn down in **, five million people went to Berlin to celebrate that.

A.
to celebrate that
B.
for its celebration
C.
to celebrate
D.
in celebration of that
E.
in celebrating
虽然这题我选的是C，但是我觉得B也是对的....

When Doris Lessing published The Golden Notebook in 1962, it instantly established herself as one of the most important literary voices of her generation.

[此贴子已经被作者于2008-10-5 20:18:29编辑过]

主题：请教几个语法题，非常的感谢