20. We tried hard, and eventually, we were able to get Mike ____us his car just for a day.

A. lending　　　　　　 B. lend　　　　　　 C. to lend　　　　　　　 D. lent

19. Susan started to clean the room; __________Lily was preparing lunch.

A. however　　　　　 B. but　　　　　　 C. meanwhile　　　　　　 D. when

18. Had you joined the caht room ten minutes ago, you would have known what we _______about then.

A. had talked　　　　　 B. have talked　　　 C. talk　　　　　　　　 D. were talking