题目内容
Guess what! I came across my primary school science teacher this morning, ______ I have lost touch for almost 20 years.
| A．of which | B．when | C．with whom | D．who |
C
解析试题分析：句意：你猜怎么了，我今天早上遇到了小学科学老师，我和他20年没有联系了。这里是定语从句，先行词是my primary school science teacher，定语从句中使用了词组lose touch with sb.所以缺少介词with和关系代词whom，所以选C。
考点：考查定语从句
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