问题
选择题
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
答案
答案：A
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。