单选题 According to recent reports, the numbers of ______ in Allenton is expected to double by the year 2010.
A. manufacturers B. manufacturing
C. manufactured D. manufactures

【正确答案】 A
【答案解析】[解析] 句子要表示“Allenton的制造商数目”时句意才自然，因此意为“制造商”的为正确答案。