---where have you been?---I___in the heavy traffic, or I would have been here earlier.
The pursuit of happiness is just a/an________of personal choice.
My grandma will stretch her arms out to hug me________I turn up to see her.
-Sorry,Betty!I forgot to inform you of the change of time. -________.
The special dance,Gangnam Style,is ________ popular all over the world and was even performed in the White House.
The tourist attraction is so designed to________our local customs and cultures in some aspects.