1 . We first broke the law in a way which was peaceful; when this was not allowed...only then____________________(我们决定） to answer violence with violence.

2 . Geography also ___________________ (起作用）in making dialects.

3 . After that, what happened to the Amber Room_____________________________.(remain)
(从那以后，琥珀屋的去处便成了一个谜。)

4 . This_____________________the two countries were at war.
这是在两国交战的时期。

5 . Frederick WilliamⅠ, the King of Prussia, could never___________________(imagine)(绝不可能想到）that his greatest gift to the Russian people would have such an amazing history.