请选择BA9D,R6q1b+i(s3T8i2U+j与别人告别时,我们应该说.G8l7O7s3N;c1Z/X;Z
A、Hello!.G8l7O7s3N;c1Z/X;Z
B、 Goodbye ..G8l7O7s3N;c1Z/X;Z