题干
—Is Peter coming?
—No, he____ his mind after a phone call at the last minute.
A：changes
B：changed
C：was changing
D：had changed
答案(点此获取答案解析）
B
—Is Peter coming?
—No, he____ his mind after a phone call at the last minute.
A：changes
B：changed
C：was changing
D：had changed
化是 ( )