根据上句完成下句，且使上下两句意思一致，每空一词。

1. To eat a balanced diet is very important. 

    ________ very important ________ eat a balanced diet.  

2. They are watching TV at 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.