You haven't completed the exercise.
Your dictionary can also help you reading and writing. It shows you grammatical information a word. Firstly, it shows you the part speech, for example, noun, verb or adjective. Secondly, it shows you extra information, example, [C] means the noun is countable, so you need learn the plural. Thirdly, you can see the spelling the word. Look closely any unusual groups of letters. Finally, good dictionaries have examples. They show you the word a sentence. Study the sentence and think the grammar of the word.
Finally, a good dictionary can help you with vocabulary. Many words in English have more one meaning. Some words can be more than one part of speech. Always look at other meanings or other parts of speech. Try learn one of the meanings. Then you can use the new word different ways.