句型转换。
1. We should exercise to keep healthy. (改为同义句)
We should exercise to _________ healthy.
2. To eat a balanced diet is very important.(改为同义句)
_________ very important _________ eat a balanced diet.
3. She has a sore throat. (改为同义句)
There is something _________ _________ her throat.
4. There is a lot of milk in the bottle.(改为同义句)
There is _________ _________ milk in the bottle.