— What is that? —It’s _______ eraser, and it’s _______ red eraser. A. a; a B. an; a C. an; an
---How much money did you pay for the drink?---None. It’s ______.
---Can you describe_______?---Of course.
---Tina, I want to have a pet. How about a dog?--- I prefer a cat. It is ______ to take care of.
This piece of music is worth __________.
---Oh, my God! We have missed the last bus. What shall we do?---I’m afraid we have no ________ but to take a taxi.