Quancheng Square is one of _____ largest in China, _____ second to Tiananmen Square. [ ]

A. the; the      

B. the: a      

C. /; the    

D. the; /

---Before you sign the contract, please read it as ________ as you can.

---Thanks for your __________.

A．carefully; requiring

B．carefully; reminding

C．careful; requiring

D．careful; reminding