A:stay; reading; went
B:stay; reading; goe
C:stayed; to read; goe
D:stayed; reading; would
马克思在谈到马丁·路德宗教改革时说:“他打破了外在的枷锁,但是给人们的心灵套上了枷锁。”材料中前后两个“枷锁”分别是指