1. Why don't you do the homework before class?
→I suggest the homework should be done before class
2.Energy-saving bulbs should be used to save electricity.
→We suggest using energy-saving bulbs to ave electricity
3. Let's clear up all the trash around the schoolyard.
→I suggest all the trash around the schoolyard should be cleared up
4. We should teach young children to care for the environment.
→I suggest young children should be taught to care for the environment
5. What about buying those products?
→I suggest that we should buy those products
6. Let's teach the children how to protect their health.
→I suggest the children should be taught how to protect their health
7. Let's collect garbage on the beach every morning.
→I suggest garbage on the beach should be collected every morning
8. Why don't we use energy-saving bulbs?
She suggests that energy-saving bulbs should be used
9. The teacher said to us, "Do your homework carefully".
→The teacher suggested that our homework should be done carefully