1.【2013届苏锡常镇四市高三教学情况调研（一）】32. It’s true that we don’t know what we’ve got until we lose it, but it’s also true that we don’t know what we ________ until it arrives.
A. had missed B. missed
C. have been missing D. will have missed
2.【2013届盐城市高三二模】23. Since the recent river pollution in Shanxi Province, people ____ more and more attention to the water quality.
A. pay B. are paying C. have paid D. have been paying
