--- What do you think of teaching, Bob? --- I find it and challenging. It is a job you are doing something serious but interesting.
--What do you think made Mary so upset ? ---______ her new bicycle.
The factory used 65 percent of the raw materials, the rest of which _____ saved for other purposes.
The children talked so loudly at dinner table that I had to struggle ______ .
When Jason failed to pay his bill, the network company ______ his Internet connection.
It is good ______ for an Arab to stand ______ to his friend when they are talking.