— Has ______ problem been solved?    

— Not yet. We're trying to think of ______ way out, but it's quite difficult to find one. [ ]

A. a; the    

B. the; a    

C. a; a      

D. the; the

我国面积最大和最小的省级行政区分别是（　　）

A．西藏、香港

B．新疆、澳门

C．内蒙古、澳门

D．新疆、香港