It’s necessary for us every subject well.
---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.
---Don’t pick flowers in the garden next time, Bill. --- ___________
Mr. Wu said he ______ us to the zoo the next week.