The noise outside was _____.
A、too irritating that
B、so irritating so his speech was hardly audible
C、so irritating that his speech was hardly audible
D、so irritating enough that his speech was hardly audible
【正确答案】：C
【题目解析】：外面的嘈杂声是如此地令人厌烦，以至于很难听清他的演讲。 So…that… 如此…以至于… ; audible听得见的; irritating 让人气愤的，让人厌烦的。
