Countries of South America - Closest Country

For each country, give the name of the country that is closest to it. The distance between them is the one between their geographical centers
Data from Portland State University (https://www.pdx.edu/econ/country-geography-data), for missing countries from CIA (https://www.cia.gov/library/publications/the-world-factbook/fields/2011.html)
Note: the answer may be in a different continent!
Quiz by scambigol
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Last updated: October 6, 2015
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First submittedOctober 6, 2015
Times taken109
Average score91.7%
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COUNTRY
CLOSEST COUNTRY
Argentina
Chile
Bolivia
Paraguay
Brazil
Bolivia
Chile
Argentina
Colombia
Ecuador
Ecuador
Colombia
COUNTRY
CLOSEST COUNTRY
Guyana
Suriname
Paraguay
Bolivia
Peru
Ecuador
Suriname
Guyana
Uruguay
Argentina
Venezuela
Trinidad and Tobago
+1
Level 65
Oct 7, 2015
I suggest giving 2:00 for time, though even that seems a bit too much.