- We are all concerned _______ her safety.
- I was really anxious about you. You ______ home without a word.
- Very few people understood this contract, ______ was very obscure.
- Sickness often _______ eating too much.
- Look at this group of people ______ beach volleyball.
- If you are too ________ of your children, they will never learn to deal with difficulties in life.
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