【题目】As was expected, the peace talk between the two countries has ________ at last and a war can't be avoided.
A.broken in
B.broken through
C.broken down
D.broken out

【答案】C
【解析】句意：正如预期的那样，两国之间的和平谈判已经崩溃，一场战争无法避免。A.broken in破碎；B. broken through突破；C. broken down崩溃；D. broken out破碎。由句意可知选C。