Here are the corrections for the mistakes found in the provided sections:

**Question Word + To-Infinitive**
1. The correct option is **(D) how cook this dish?** (Correct choice: "how to cook this dish")
2. The correct option is **(A) when to leave.**
3. The correct option is **(B) where to go.**
4. The correct option is **(A) what to write.**

**Double Comparatives**
1. The correct option is **(C) the more best you get.** (Correct choice: "the better you get")
2. The correct option is **(C) the more difficult it becomes.**
3. The correct option is **(B) the smartest you become.**
4. The correct option is **(C) the more less stressed you’ll be.** (Correct choice: "the less stressed you’ll be.")
5. The correct option is **(C) the best experiences you gain.**

**Modal Verbs with Conditional Type 1**
1. The correct option is **(B) will go.**
2. The correct option is **(B) could pass.**
3. The correct option is **(A) will;** it should actually suggest urgency: "If you hurry, you will catch."
4. The correct option is **(B) should attend.**
5. The correct option is **(A) will answer.**

These corrections ensure the sentences are grammatically accurate and convey the intended meaning clearly.