Write the correct form of the adjective in brackets: This is Tony Pratt and his sister, Fiona. Tony is e.g. taller (tall) than Fiona, but she is 26) ________ (old) than him. She is the 27) ________ (old) student in her class. They both like running, but Tony is 28) ________ (fast) than Fiona. In fact, Tony is the 29) ________ (fast) boy in their school. Sometimes they argue, but Tony thinks Fiona is the 30) ________ (good) sister in the world.

Here are the answers with explanations: 26) older - We use the comparative form 'older' when comparing Fiona's age to Tony's. 27) oldest - We use the superlative form 'oldest' to indicate that she is the oldest student in her class. 28) faster - We use the comparative form 'faster' to compare Tony's running speed to Fiona's. 29) fastest - We use the superlative form 'fastest' to indicate that Tony is the fastest boy in their school. 30) best - We use the superlative form 'best' to indicate that Tony thinks Fiona is the best sister in the world.