出手吧——3 day CTA pass for $9 on Groupon http://www.groupon.com/deals/chicago-transit-authority-cta?s=he
注意条款：
Expires Sep 3, 2013
Limit 4 per person. Must activate by expiration date, pass expires 72hr from
activation date. Shipping address required to redeem CTA 3-day pass. Allow
5-10 business days for delivery. Not valid with other CTA offers.
See the rules that apply to all deals.
