想问大家关于接到面试电话时的两个问题，
1。问我Social Security Number last four digit,这个一定要告诉他么？还是最后确定了告诉就好，毕竟这是保密信息阿。
2。一接到电话说什么好呢，可不可以说, "so glad to hear from you." ?

谢谢华人热心得JMS

Thanks for your reply and encouragement.
Anybody konws question 1 about SSN?