核心问题
He came back late, ____ which time all the guests had already left. A. after B. by C. at D. during(全国四级,99.6-41) 答案为 B, 但 by which 的用法却很难解释。
词典解答
见 in which case。
in which case 见 in
He came back late, ____ which time all the guests had already left. A. after B. by C. at D. during(全国四级,99.6-41) 答案为 B, 但 by which 的用法却很难解释。
见 in which case。
in which case 见 in