纠正和纠正措施都是为了消除已发现的不合格和其他不期望情况所采取的措施，因此是相同的（）
参考答案：错
It came as a great _______ to the parents that their son finally came back safe and sound.
A．favor
B．sense
C．relaxation
D．relief
(2013·高考江西卷)He wrote a letter________he explained what had happened in the accident.
A．what
B．which
C．where
D．how
