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2020 online multiple-choice and fill-in-the-blank be able to positive exercises across 101 tests provide a wide range of sentences to help you grasp the context and usage/formation of the be able to positive form. Prepare for exams, practice be able to positive form online and verify your answers immediately. Expand your English grammar proficiency with interactive be able to affirmative form activities. Suitable for kids, adults, ESL learners at the beginner, elementary, and intermediate levels.