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 READ THE WHOLE SENTENCE OUT LOUD adding the missing words, then click "TOGGLE" to check.                
                 Make a note of any you didn't know or got wrong and do them AGAIN once you finish the exercise. 
                 
                 HINT: REPETITION is the key to learning vocabulary, so do the test:
                 
                   at least twice NOW again TOMORROW in four days' timein a week's timein two weeks' time |