I’ll never forget the time____ we learned a lot from these workers
A. when B. which C. at which D. on which
I’ll never forget the time____ we learned a lot from these workers
A. when B. which C. at which D. on which
A
先行词是time，引导词在从句中作状语，因此用when。C, D介词使用错误，可以说during which。