Below are some tips for you to follow:

• Watch English movies.
• Listen to podcasts, of course, English.
• Talk to a fluent speaker of English and try to use the language most of the time.
• Try English teaching applications such as Duolingo or free online courses as provided on Coursera, glow and lovely (if you're a female); you can find many on Google.
• Learn one new word every day at least and use it while speaking.
• Take word/sentence quizzes.
• At least read for half-an-hour every day.

A fullerene is an allotrope of carbon whose molecule consists of carbon atoms connected by single and double bonds to form a closed or partially closed mesh, with fused rings of five to seven atoms.

Diamond, graphite, and fullerenes (substances that include nanotubes and 'buckyballs', such as buckminsterfullerene) are three allotropes of pure carbon.