— Could we practice playing the guitar in the hall, Sir ? —No , ___________ you have the principal’s (校长) note.
---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.
There is ______ “u” in the word “your”.