幫我係以下D句子中加上介詞:
1.The boys are walking hand _______ hand.
2.He has promised to find a job ________ me.
3.Peter is always late _______ school.
4.If you want Ellen to receive it by Christmas,you must send it ________ air mall.
5.Not all dlicious food is good ________ health.
6.The dog is barking ________ the thief.
7.Don't be afraid ________ it. It won't hurt you.
8.Janet lost her purse. She is now looking _______ it.
9.What's the matter _________ Lily?
10.Kelvin is playing ________ Oliver.
11.Let's sit _________ the fire to keep warm.
12.Patsy is very good _________ computer work.
ThX''"