One of the most important questions they had to consider was__________ of public health
There is no simple answer,________is often the case in science.
Finding information in today’s world is easy.The ________is how you can tell if the information you get is useful or not.
Helen has been looking for a job over the whole year,feeling she can’t get________without work experience.
—I’d like to be on my own for a while.Do you mind?—________.Go ahead.
—Does Shelley like shopping?—Well,she would rather spend time________at home than________in the street.