My father isn’t in good health now. I think he should pay attention____ exercise.
---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”.
--- Where is Jim?--- He _________ to the museum. He hasn’t come back.