21. It is quite another thing to own a zoo and live in it.
Ans:- Compound sentence
22. The sky will be slightly tinged with yellow when you are awakened by the birdsong.
Ans:- Complex sentence
23. A male peahen is dancing, his burnished tail raised like a fountain in the sunlight.
Ans:- Simple sentence
24. the cages The gorillas have been let out of their cages while the cages are cleaned.
Ans:- Complex sentence
25. They try to wrench the electric heaters from their sockets, or break the fluorescent lights.
Ans:- Compound sentence
26. You pass slowly down the house to the big case at the end where the touracos now live.
Ans:- Complex sentence
27. Then, if you call to him, he will fly down and land on a perch nearest to you.
Ans:- Complex sentence
28. As they come flooding into the grounds, everyone has to be alert.
Ans:- Complex sentence
29. This is not to ensure that the animals do not hurt the people, but to make sure that the people do not hurt the animals.
Ans:- Compound sentence
30. A thousand forests crushed under the rain, had grown up a thousand times to be crushed again.
Ans:- Simple sentence
31. Here was located the schoolroom of the children belonging to men and women who came by rockets from Earth.
Ans:- Complex sentence
32. When the sun came out last time seven years ago they were too young.
Ans:- Complex sentence
33. They could not recall the sun when it came out for just an hour and showed its face to the stunned world.
Ans:- Complex sentence
34. They had been only two years old when the sun last came out.
Ans:- Complex sentence
35. They played in the echoing tunnels of the underground city and sang of summer and the sun.
Ans:- Compound sentence
36. It was as if a hurricane had lost its sound.
Ans:- Complex sentence
37. The silence was so immense one would feel as if the ears had been stuffed.
Ans:- Complex sentence
38. It was the colour of flaming bronze and it was very large.
Ans:- Compound sentence
39. The jungle grew and never stopped growing.
Ans:- Compound sentence
40. Presently, he wished that he was sick; then he could stay home from school.
Ans:- Compound sentence