1. ---Good morning, Mr. Lee's office.
---Good morning. I'd like to make an appointment ________ next Wednesday afternoon.
A. for B. in C. on D. with
2. Bob thought he couldn't go to the party because he had to write a report, but he went ________ all.
A. at B. after C. in  D. with
3. Not until all the fish died in the river, ________ how serious the pollution was.
A. did the villagers realize  B. the villagers realized    
C. the villagers did realize D. didn’t the villagers realize