8. The presidents of America and Canada hold regular meetings, they can discuss ways to strengthen security cooperation between the two countries.
A
where
B
which
C
what
D
why
句意为：美国和加拿大总统举行例会，商谈两国加强安全领域合作。先行词meetings视作地点，A where表示地点，所以选择A。
此题是连词辨析，首先要明确句意，其次判断缺位单词。
连词判断。