1. should be protected from hunting

2. that we should leave the place at once.

3. should be used.

4. that Tom should have a doctor checked his throat.

5. using electricity economically.

6. the heavy fog, we won't go on our trip.

7. the length of this exercise, we can't finish it on time.

~Xin hay nhất ạ~

54. The monitor suggested that these animals should be protected from hunting. 

55. They suggested us leave the place at once. 

56. I suggested that the energy saving-bulbs should be used.

57. Mary suggested John have a doctor check  his throat. 

58. I suggested using electricity economically. 

59. Because of the heavy fog, we won't go on your trip. 

60. Because of the long exercise, we can't finish it on time.