单项选择题 Science and society are________collaborators: In the best of worlds we may achieve a very fine and finely negotiated partnership, and in the worst of worlds,________one by the other.

单项选择题 After the investigations and________that are both necessary and inevitable after a calamity such as the recently ended crisis, it may turn out that authorities could have handled the problem in a less________way.

单项选择题 It may be________to obtain soap that is not antibacterial, given its________as a household cleansing product, but according to a new study, such products may be a waste of time.