問題補充：
單選題
China and the United States held their first strategic dialogue on August 1 and ________ to increase co-operation and constructive relations．A.agreedB.would agreeC.have agreedD.had agreed
網(wǎng)友答案：
熱心網(wǎng)友 1樓
A解析因為有確定的過去時間on August 1，再考慮and連接的并列句應(yīng)時態(tài)一致，所以選A。
