More than 68,600 foreigners are working in Shanghai.The number is 13 times of 1996，when Shanghai started issuing expatriate work permits.
A. one
B. ones
C. that
D. those
网友回答
A. one
B. ones
(答案→)C. that
D. those
解析：考查代词。句意：现在有超过68 600个外国人在上海工作。此数量是1996年开始签发侨民工作许可证时的13倍。此处that指代上文中的“number”。故正确答案为C。