问题补充：
There is homework for us to do .It’s to finish it in such a short time.
A. much too, unable
B. too much, possible
C. too many, impossible
D. too much, impossible
答案：
A. much too, unable
B. too much, possible
C. too many, impossible
(答案→)D. too much, impossible
解析： much too中心词是too,much此处做副词表示程度,意思是太，修饰形容词;too much中心词是much,much此处意思是多,too作为副词修饰much,意思是太多，修饰不可数名词。Too many的中心词是many，意思是太多，修饰可数名词复数。homework不可数名词，根据句意可知完成作业在那么短的时间是不可能的。故选D
