37.When did you start your hobby
38.My sister enjoys cooking and making new dishes
39.You should not play more computer games in your free time
40.David eats lots of junk food, and he does not exercise

37. When/you/start/ hobby?
-When did you start your hobby?
38.My sister/ enjoy/ cook/ and/ make/ new dishes.
-My sister enjoys cooking and making new dishes.
39. You/ not play/more/ computer games/ free time.
-You should not play more computer games in your free time.
40. David/ eat/ lots of junk food/ he/ not do exercise.
-David eats lots of junk food, and he does not exercise.