将下列句子改为同义句,每空一词。 1. To eat a balanced diet is very important. ________very important________eat a balanced diet. 2. They are watching TV a t home now. They are watching TV at home________ ________ ________. 3. What's wrong with your sister? What's________ ________with your sister? 4. She has a sore throat. There is something________ ________her throat. 5. There is a lot of milk in the bottle. There is________ ________milk in the bottle.