It is said that ______ 2000 factories were closed down during the economic crisis.

选择一项：
A. properly
B. approximately
C. considerably

译文：据说，在经济危机期间大约有2000家厂子关闭。 解析：properly意为“适当地”；approximately 意为“大约”；considerably意为“ 相当地”；只有B项符合题意，所以选B。 正确答案是：approximately