Here are the correct prepositions and words for the sentences:

**Exercise 1 (Prepositions of Time and Place)**
1. He lives **with** his parents in a small apartment.
2. I will meet you **at** 4:00 PM.
3. The concert starts **at** 7:30 PM.
4. We always have breakfast **in** the morning.
5. Our flight leaves **at** 6:00 AM.
6. I have an appointment **on** Thursday.
7. I'm going to visit my grandmother **on** the weekend (or **at** the weekend - UK English).
8. My birthday is **in** June.
9. I'll meet you **at** 7 PM.
10. The concert starts **at** 8 PM.
11. I usually have breakfast **in** the morning.
12. The party starts **at** 7 o'clock.
13. I'll be busy **for** the whole weekend.
14. She has been studying English **for** two years.
15. The concert is scheduled **for** Thursday night.
16. They went on vacation **in** August.

**Exercise 2 (Adjectives and Adverbs)**
1. He felt **sad** after receiving the bad news.
2. She looks **happy** today.
3. She performed **well** in her exams and got the highest score in the class.
4. She feels **tired** after working for long hours.
5. She donated **generously** to help others understand.
6. She is a good swimmer and can **easily** swim across the lake.
7. She faced the challenge **bravely**.
8. The turtle is very **slow**.
9. She held the glass vase **carefully**, afraid it might break.
10. She danced **gracefully** and amazed her audience.
11. He is **brave** enough to fight the dragon.

Exercise 1 
1. He lives with his parents in a small apartment.
2. I will meet you at 4:00 PM.
3. The concert starts at 7:30 PM.
4. We always have breakfast in the morning.
5. Our flight leaves at 6:00 AM.
6. I have an appointment on Thursday.
7. I'm going to visit my grandmother at the weekend.
8. My birthday is in June.
9. I'll meet you at 7 PM.
10. The concert starts at 8 PM.
11. I usually have breakfast in the morning.
12. The party starts at 7 o'clock.
13. I'll be busy for the whole weekend.
14. She has been studying English for two years.
15. The concert is scheduled for Thursday night.
16. They went on vacation in August.

Exercise 2 
1. He felt sad after receiving the bad news.
2. She looks happy today.
3. She performed well in her exams and got the highest score in the class.
4. She feels tired after working for long hours.
5. She donated generously to help others understand.
6. She is a good swimmer and can easily swim across the lake.
7. She faced the challenge bravely.
8. The turtle is very slow.
9. She held the glass vase carefully, afraid it might break.
10. She danced gracefully and amazed her audience.
11. He is brave enough to fight the dragon.