–What do you think of your job, Bob?–Though ____ flexibility, it is a job____ you are doing something serious but interesting.
David is such a good boy _______ all the teachers like him.
David is such a good boy _______ all the teachers like.
______ is mentioned above that the number of the students in senior school is increasing.
_____ is mentioned above, the number of the students in senior school is increasing.
_______ is known to everybody that the moon travels round the earth once every month.