ItwasonAugust24th,79AD      avolcaniceruptionoccurred,...

问题详情：

 It was on August 24th, 79AD       a volcanic eruption occurred,       left a deep

impression on a Roman writer.

A. when; that                   B. when; which             C. that; which               D. that; when

【回答】

C

知识点：连词

题型：选择题