We _____ to move but are still considering where to go to.

A．are deciding

B．decided

C．have decided

D．had decided

根据《建设工程质量管理条例》，供热系统的最低保修期为()。

A.2个采暖期 

B.1个采暖期 

C.3个采暖期 

D.合同规定的采暖期