When a free-rider problem exists,

She dreamed of being a rider in a [u]      [/u]. A: circles B: circus C: attention

Driver is to truck as () A: horse is to rider B: hiker is to trail C: waiter is to restaurant D: engineer is to train E: mother is to baby

The rhetorical device used in the following poem attributed to Benjamin Franklin and others is , which achieves not only an emphatic effect but also a humorous effect. For want of a nail the shoe was lost. For want of a shoe the horse was lost. For want of a horse the rider was lost. For want of a rider the battle was lost. For want of a battle the kingdom was lost. And all for the want of a horseshoe nail."

You can travel _____, but children under five travel ____. A: freely … free B: free … freely C: free … free D: freely … freely

In a “first-best” world：（ ） A: Free trade is not optimal. B: Free trade is economically efficient. C: Free trade benefits everyone. D: Free trade harms everyone.

In some countries, newspapers _____ government control, and different political views can be seen in them. A: feel free from B: feel free to C: are free from D: are free to

If that time does not fit into your schedule, please to suggest a day that is more convenient to you. A: feeling free B: to feel free C: feels free D: feel free

When a morpheme is free to occur as an individual word, it is a free morpheme.

The internship provides all of the following EXCEPT（） A: a small stipend B: free room C: free trip D: free meals