— 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.

—                  

—  I mean the best way is using your own mobile phone or computer to operate it. 

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 think we can use two or more kinds of media together in an advertising campaign. 

—                      

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

—