If you are invited for 4:00,you have to
问题:
If you are invited for 4:00, you have to be there _ .[ ]
A.at times
B. on time
C. behind time
D. from time to time
If you are invited for 4:00, you have to be there _ .[ ]
A.at times
B. on time
C. behind time
D. from time to time