It looks like you need help completing the sentences. Here are suggestions for each blank:

16. There were many people in the theater. I couldn’t find the seat **assigned to me**.

17. She was very short. She couldn’t reach the tops of the high shelves **in the kitchen**.

18. Those exercises are easy so they could finish them in half an hour **or less**.

19. His sudden appearance gave her a great surprise. She burst out crying **tears of joy**.

20. I had a lot of trouble with my schoolwork. I had to ask for help **from my teacher**.

21. There were a lot of questions on the test. I couldn’t finish it in half an hour **as I had hoped**.

22. The children took a large bite of sandwich. He couldn’t chew it **easily**.

23. It was a delicious dessert. I decided to order **another** portion.

Feel free to adjust any of these based on your preferences!