The old engineer talked of the difficulty they ___ the towerA. built B had building C had built D build 选B 为什么啊?怎么解释?

The engineer with whom my father works is about 50 years old.这句话什么意思 the engineer my father works is a bout 50 years old 主句是什么 从句是什么 The Chief Engineer是什么意思 His___(old) brother is an engineer. The engineer ____ my father works is about 50 years old.该选哪个?为什么?The engineer ____ my father works is about 50 years old.A.to whom B.who C.which D.that The engineer with whom my father works is about 50 years old请问关系词怎么不用who THe engineer--my father works is about 60 years old.1.to whom2.on whom.3.with which4.with whom the schedule engineer怎么读 engineer engineer The old engineer talked of the difficulty they ___ the towerA. built B had building C had built D build 选B 为什么啊?怎么解释? What does the old man do _________.A:He's a engineer B:He is reading C:He likes running 说明 .The engineer ______my father works is about 50 years old.to whom B.on whom C.with which D.with whom 填词 Did the engineer e---------------the machine The engineer ______ my father works is about 50 years old.为何不可选B?我是想用work on来表示我父The engineer ______ my father works is about 50 years old.A.to whom B.on whom C.with which D.with whom为何不可选B?我是想用work on来 TAL 是什么意思 approved in writting by the engineer To learn the engineer it not easy,