1)choose the superlative form of the adjective: 1. more expensive the most expensive 2. the most beautiful the more beautiful 3. the more complicated the most complicated 2) choose the comparative form of the adjectives: 1. the most important more important 2. more popular the more popular 3. the more interesting more interesting

1)

1. The most expensive

2. The most beautiful

3. The most complicated

2)

1. More important

2. More popular

3. More interesting

1) Superlative form of the adjective:

- The correct answer is "the most expensive".
Explanation: When comparing three or more things, we use the superlative form of an adjective. In this case, we are comparing the level of expense, and "the most expensive" indicates the highest level of expense among the options given.

- The incorrect answer is "the more beautiful".
Explanation: "The more beautiful" is the comparative form of the adjective. It is used when comparing two things. Since we are comparing three or more things in this question, we need to use the superlative form.

- The incorrect answer is "the most complicated".
Explanation: "The most complicated" is also the comparative form of the adjective, not the superlative. It is used when comparing two things, but in this question, we need the superlative form to compare three or more things.

2) Comparative form of the adjectives:

- The correct answer is "more important".
Explanation: "More important" is the comparative form of the adjective. It is used when comparing two things. In this case, we are comparing the level of importance, and "more important" indicates a higher level of importance compared to something else.

- The incorrect answer is "the more popular".
Explanation: "The more popular" is also the comparative form of the adjective. It is used when comparing two things, but in this question, we need to choose the comparative form.

- The incorrect answer is "more interesting".
Explanation: "More interesting" is the comparative form of the adjective. It is used when comparing two things, but in this question, we need to choose the comparative form.