What are you doing here now? —- I’m thinking _________ chatting with my good friends.

How far is it _____your home _____the centre of the city?[ ]

Mom, where’s my backpack?－You shouldn’t put your things casually, you should take good care of _____ own things.

Math is boring and difficult.

Excuse me.Could you tell me_______?Which of the following is WRONG?