... 2. With WHERE, WHEN where = in which The building is very old. He lives there.The building in which he lives is very old.The building where he lives is very old. when = on which ... write complete sentences. Some people / keep dogs / pets / others / have / cats. My older brother / study / law / my younger brother / study / medicine III. COMPLEX SENTENCES A. ... how / system work It / true / car / cost / a lot / but it / good investment III. COMPLEX SENTENCESC. Adverb Clauses1. Adverb Clause of TimeCLAUSE +when, until, while, before, after,...