China and the United States held their first strategic dialogue on August 1 and to increase co-operation and constructive relations.
A. agreed
B. would agree
C. have agreed
D. had agreed
网友回答
(答案→)A. agreed
B. would agree
C. have agreed
D. had agreed
解析：因为有确定的过去时间on August 1，再考虑and连接的并列句应时态一致，所以选A。