Every time they met they talk about former classmates they remembered.A. couldB. wouldC.

问题补充：

Every time they met, they talk about former classmates they remembered.

A. could

B. would

C. should

D. will

答案：

A. could

(答案→)B. would

C. should

D. will

解析：考察时态。时间状语从句中用一般过去时代替过去将来时，主句使用过去将来时，故B正确。