Here are the best answers to complete the dialogue:

1. **A. Ugh, I feel exhausted!**
This response fits well with Anna's comment about feeling overwhelmed with homework.

2. **D. I remember my mom saying sleep is super important.**
This aligns with the earlier statement about needing healthy habits and emphasizes the importance of sleep.

3. **B. But what about breakfast?**
After discussing late-night habits, it's logical to consider breakfast as part of their morning routine.

4. **A. Oh, don't remind me.**
This reaction suggests that Brian is aware of how he feels after eating fast food and agrees with Anna's point.

5. **C. Plus, it'd be fun to learn some new cooking skills.**
This response shows enthusiasm about cooking while also contributing to the discussion about healthy eating habits.

6. **A. This is awful!**
This fits the context where Brian expresses how he feels after eating unhealthy fast food, indicating a strong negative reaction.

Putting it all together, the dialogue would read like this:

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**Anna:** (1) **Ugh, I feel exhausted!** This homework is never-ending.
**Brian:** Tell me about it. I stayed up way too late watching that new show.
**Anna:** Maybe we need a serious energy boost. All this junk food and late nights are catching up to us.
**Brian:** You're right. I feel sluggish all day. Maybe it's time to think about some healthy habits.
**Anna:** Totally! (2) **I remember my mom saying sleep is super important.**
**Brian:** Yeah, she's probably right. We should aim for 8 hours a night, right?
**Anna:** Exactly! And ditch the late-night snacking. Maybe some fruit before bed instead?
**Brian:** Hmm, good point. (3) **But what about breakfast?** because I'm rushing out the door, or I'll be late for school.
**Anna:** Same! We could try prepping some healthy snacks the night before. Like overnight oats or some yogurt with granola.
**Brian:** That sounds way better than a greasy donut on the way to school.
**Anna:** Speaking of greasy, how about we cut back on fast food?
**Brian:** (4) **Oh, don't remind me.** My stomach feels like a lead weight after those burgers.
**Anna:** We could cook more at home! There are tons of healthy and delicious recipes online. We could even search for "teen-friendly" ones.
**Brian:** Yeah, we could make a weekly meal plan. (5) **Plus, it'd be fun to learn some new cooking skills.**
**Anna:** Exactly! And exercise? We haven't even mentioned that. Remember how good we felt after that jog last week?
**Brian:** You're right! We should make it a regular thing. Maybe find a workout buddy or join a sports team.
**Anna:** Great idea! We could even start small with some quick morning exercises at home.
**Brian:** (6) **This is awful!** A little effort for a healthier body.
**Anna:** Totally! Maybe we'll have more energy for all that homework after all!
**Brian:** Now that's a win-win!