—Were you late ________  the meeting?

—No, I arrived there ten minutes________ the meeting started.

—Were you late ________  the meeting? 

—No, I arrived there ten minutes________ the meeting started.

1. A.
   for ; before
2. B.
   at ; before
3. C.
   for ; till
4. D.
   at ; after

—Were you late ________  the meeting?
—No, I arrived there ten minutes________ the meeting started.

—Were you late ________ the meeting?

—No, I arrived there ten minutes________ the meeting started.

　 A. for ; before　　　　　　　 B. at ; before

　 C. for ; till　　　　　　　　　 D. at ; after