A lot of people are here _______ vacation every year. [ ]
Oh, Mrs. Liu, your necklace looks nice. Is it new? — No, I ____ it for two years.
It ____ over 10 years since my grandpa _______.
Do you know the person with __________ he always chatted online?—Yes, one of his QQ friends.
A ______ dog is barking ________ at us. We hate it.