Question

       to the conference, we have already discussed this problem among ourselves.

A．Similar

B．Previous

C．Cautious

D．Senior

Answer 1

B

B 考查词义辨析。“早在回忆之前，我们已经相互讨论了这个问题。”similar相似的；previous在以前；cautious谨慎的；senior高级的，年长的。故选B。