问题补充：
pieces of bread in the box?
A. How many; is there
B. How much; is there
C. How many; are there
D. How much; are there
答案：
A. How many; is there
B. How much; is there
(答案→)C. How many; are there
D. How much; are there
解析：bread是一个不可数名词，用how much，pieces用了复数形式，说明不只一份 用are
