Do you have a minute? I’ve got something to tell you—- OK, __________ you make it short

____ at the party, we saw Ruth standing alone in the corner of the hall.[ ]

It is known to us that doing exercise_____ our health,and that is to say, ouhealth can ____ doing exercise.[ ]

Her life____________ a lot in the last few years.

下列各句中标点符号的使用正确的一项是(　　)