I saw a woman _____ against the wall ____ tired and stressed and as though she'd been crying.   [      ]

A. leaning up；looking            

B. lean up; look

C. leaned up; looked

D. was leaning up; was looking

热工自动调节设备需评定级别或升级时，其投入累计时间占主设备运行时间的（）以上方可列入统计。

A.75%

B.80%

C.85%

D.90%