问题
Leaders of the BRIC countries—–Brazil, Russia, India and China—-_______their second summit on FridayPresident Hu Jintao then returned home to help direct relief work ______the deadly earthquake in Qinhai
A:left, to follow
B:concluded, following
C:had left, following
D:had concluded, followed
B:concluded, following
C:had left, following
D:had concluded, followed
正确答案是：
