It’s quite an informal gathering, you needn’t _____ for it. [ ]

（2015·四川）Little Tom sat ________watching the monkey dancing in front of him.

____ do you eat junk food— I like it. I eat it three times a week.

Did you return the book you borrowed from Tom?— Yes, I gave it to him ______ I saw him.

That young woman must have something to do with the crime, right— . Though she insisted she hadn’t done anything against the law.