34. People should stop experiments on animals.
⇒ Experiments on animals should be stopped.
35. His cough gets worse because he doesn't give up smoking.
⇒ If he doesn't give up smoking his cough will get worse.
36. Let's take a shower instead of a bath to save energy .
⇒ My mother suggested that Let's take a shower instead of a bath to save energy.
37. A
38. D
