____medicine works in a human body is a question ____ not everyone can understand fully.
_______ his sister, Jack is quiet, and does not easily make friends.
The television station reported several times to _________ drivers parking their cars on the blind road.
——Can I smoke here? ——Sorry. We don’t allow _______here.
You are so _______to have brought your laptop. You see, mine is broken.
The company ______ founded in 2005 and most of the employees ______ women.