— 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.

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

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

Prices may change quickly if supply or demand         .

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

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