1 . One friend of mine has decided to ________(离任) his highly paid but demanding position in his company recently. （根据汉语提示单词拼写）

2 . Kids d____________ on their parents for foodand clothing when they are young.

3 . I got this book by c____________ at a second-hand bookshop.

4 . Not until he took off the sunglasses did I __________ (辨认出) him.