At the household level, personal saving rate in the U.S. is ______.

A．They face them.
B．They are interested in them.
C．They accept and enjoy them.
D．They ignore them.

A．The friend was expecting to stay with him.
B．There was no key in the doormat.
C．The friend had a wonderful meal in his absence.
D．The friend got into the neighbour’s flat.