John thought he was   when the manage asked him for the advice on the new product.

—Which of the two subjects do you like, art or music?—        . They are really interesting.

—Here are three books on history. Which one would you like to borrow?—______. You see, I’m interested in geography these days.

Do you think _____ true that _______is hard work that leads to success?

One of the most important questions they had to consider was         of public health.