Mixed Relative Clauses - Advanced Practice

This advanced exercise combines all relative clause types in a single set of questions: defining and non-defining clauses, formal whom, preposition placement, and pronoun omission. At this level, each sentence requires multiple decisions — which pronoun, which position, whether to add commas, and whether the pronoun can be omitted. The goal is to develop the flexible thinking needed for real English communication and exam success.

A useful strategy for complex relative clause questions: first, decide if the clause is defining or non-defining (does it identify or just add extra information?). Second, choose the pronoun based on what it refers to (person, thing, place, time, possession). Third, check formality — is "whom" or a fronted preposition needed? Fourth, consider omission — can the pronoun be dropped? This four-step approach helps you work through even the most challenging sentences systematically. Cambridge B2 First and C1 Advanced use-of-English papers regularly include mixed relative clause questions that test all these skills together.