— Is it better to be physically attractive or intelligent?

   —                      . 

— Do you prefer a portable or a clumsy 3D printer?

—                      .

Sometimes buyers only purchase some        , tangible or intangible.

You can have eggs      or hard-boiled.

As a rule, the buyer is responsible for        a ship or booking the shipping space.

Goods are carried by several        of transport--on road or rail, by sea or air.

— Hey, Derek, which do you think is harder to learn, marketing or designing?

—                       

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

      people are no longer worried about whether their food is safe or not      they enjoy a better life.

Every child is unique. Don’t        him or her to others.

— May I suggest the sales start on or about October 1?

—                      .

Actually, buyers are the group of people          want to buy certain goods or services.

Prices may change quickly if supply or demand         .

— I wonder whether I could accept this discount or not.

—                      

普通年金终值是以计算期期末为基准，按照货币时间价值计算未来每期在给定的报酬率下可收取或者给付的年金现金流的折现值之和。（）