Here are the completed sentences using words that fit the given first letters:

1. You could see the audience’s **e**xpression on their faces as they watched.
2. Taking a few simple precautions before using special facilities in the gym will reduce your risk of **i**njury.
3. They are **c**ompeting against teams of full-time professional players.
4. As part of the **p**reparation for her latest role she had to gain almost five kilos in weight.
5. I found his last film a bit **d**isappointing, actually - I expected it to be better.
6. Doing exercises regularly might help people reduce the feeling of **a**nxiety and depression.
7. A host of youngsters are not well **a**ware of the importance of reading in their future career.