11. The mountaineers knew that if they____ shelter before dark, they ____to death.
A. weren't able to reach – have frozen
B. aren't reaching - were freezing
C. couldn't reach - might freeze
D. wouldn't have reached - had to freeze 12. If I ____better attention, I _____you a better description of the man, but it didn't seem important at the time.
A. was paying - had been giving
B. could have paid - gave
C. had paid - will have been giving
D. had been paying - could have given
13. If you___too much pain while you___, you can take one of these painkillers.
A. could experience-had been recovering
B. would experience- have recovered
C. should experience- are recovering
D. experienced- would have recovered
14. Scott____ Catherine if he ____ down Glamorgan Road on Friday afternoon.
A. didn't see - hasn't driven
B. won't see - wasn't driving
C. couldn't see- hadn't driven
D. wouldn't have seen - hadn't been driving