问题补充：
The workers can complete the new bridge in .
A. two and a half month
B. two months and half
C. two and a half months
D. two month and a half
答案：
A. two and a half month
B. two months and half
(答案→)C. two and a half months
D. two month and a half
解析：two and a half months=two months and a half.两个半月。
