Mr Li began to teach in this school, , some time later, she became popular with the teachers and students for her excellent teaching levels.
A. where
B. when
C. that
D. which
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(答案→)A. where
B. when
C. that
D. which
解析：本题是由where引导的非限制性定语从句, 先行词为表地点的school, where在从句中作状语, 因句中有时间状语some time later, 可排除when。