问题补充：
I’m tired run. Let’s stop and relax.
A. so, that
B. very, to
C. much too, that
D. too, to
答案：
A. so, that
B. very, to
C. much too, that
(答案→)D. too, to
解析：句意：我太累了以至于我不能跑了。让我们停下来放松一下。so...that...如此...以至于...that后面跟从句too...to... 太...而不...；adj.得...to后面直接跟动词This was so cheap that I had to buy it.这个太便宜了，以至于我非买不可。This was too cheap to pass.这个太便宜了，不买不行。故选D
