Children under sixteen are not permitted to participate in such kind of activities _____ bad for their mental development.
Mary wanted to travel around the world all by herself, but her parents did not _______ her to do so.
We thought there were 35 students in the dining hall, ______, in fact, there were 40.
John, a friend of mine, who got married only last week, spent $3,000 more than he______for the wedding.
It is no______ arguing with Bill because he will never change his mind.
It was not until she got home ______ Jennifer realized she had lost her keys.