5.Brazil is the largest soybean producer and the third maize producer in the world, contributing with 30% and 7%, ( ), of the global harvest of these crops in 2013.

　　A. exclusively

　　B. incredibly

　　C. respectively

　　D. undoubtedly

　　【答案】C。句意为：巴西是世界上最大的大豆生产国和第三大玉米生产国，分别占2013年这些作物全球收成的30%和7%。A.唯一地，B.难以置信地，C.分别地，D.无疑地 所以答案选C。