The engineer ______ my father works is about 50 years old.

题型：单选题题类：常考题难易度：普通

仁爱科普版九年级上Unit 4 Topic 3 China is the third nation that sent a person into space.专题练习：定语从句

A、to whom B、on whom C、with which D、with whom

举一反三

Anyone {#blank#}1{#/blank#} {#blank#}2{#/blank#} never made a mistake has never succeeded.

—Yes. He is Peter's friend. They are celebrating his birthday.

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