日期:2011-01-19 10:14
B：Why don\'t you try again in an hour？He will be free then．
A：OK．Thanks a lot．Good-bye．
B：Good-bye．
Dialogue B
(A：Receiver B：Prof．Davis)
A：Good afternoon．David Brown\'s office．
B：bd afternoon．This is Prof．Davis from the University ofWashington．