Completion count: 545
1477 online multiple-choice and fill-in-the-blank one vs ones exercises across 72 tests provide a wide range of sentences to help you grasp the context and usage/formation of the one ones. Prepare for exams, practice one ones online and verify your answers immediately. Expand your English grammar proficiency with interactive one or ones activities. Suitable for kids, adults, ESL learners at the beginner, elementary, and intermediate levels.