English test unit 3: WHAT DO I HAVE TO KNOW?

Vocabulary: adjectives- heavy, light, clean, dirty, tall, short, young, old, thin, fat, dry, wet, cold, hot, difficult, easy, dangerous, safe, expensive, cheap, late, early, good/better/ the best, bad/worse/the worst, popular, fast, slow. 

Grammar: comparative (she is taller than me), superlative (she is the tallest of the class), as....as (you are as tall as my sister).