The plane will take off at 6:00 pm, so I have to be at the airport 4:00 pm at the latest.
A. after B. until C. since D. by正确答案D
The plane will take off at 6:00 pm, so I have to be at the airport 4:00 pm at the latest.
A. after B. until C. since D. by正确答案D
