Although you may meet some difficuIties,you should never .
---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.
---It’s said that scientists have ________ a way to deal with the disease(疾病)---Really? That’s great!
---Would you like coffee or tea?---I prefer tea ______ milk.