• Hotels have developed as rapidly as restaurants.

  • Correct answer: A. "As rapidly as" is the correct structure for making comparisons of equality.

• Computers are regarded as the most modern tools today.

  • Correct answer: B. "The most modern" correctly refers to the highest degree of modernity in this context.

• My sister dances better than me.

  • Correct answer: C. "Better" is the comparative form of "good" for describing how well someone does something.

• My new sofa is more comfortable than the old one.

  • Correct answer: A. "More comfortable" is the correct comparative form for adjectives with two or more syllables.

7 A. as rapidly as

8 B. the most modern

• This phrase is used to describe computers as the most modern tools compared to all other tools.

9 C. better

• "Better" is the comparative form of "good" and is used to compare your sister's dancing ability to yours.

• "More comfortable" is the comparative form of "comfortable" and is used to compare the comfort level of your new sofa to the old one.