B: I have been to Beijing.
B：我去過北京。
Staff have been retrained to use the new technology.
為使員工學會運用新技術，對他們進行了再培訓。
Several computer engineers have been contracted to the finance department.
有幾位計算機工程師與財務部門簽訂了合同。
I must have been insane to agree to the idea.
我肯定是犯傻了，居然同意了這個想法。
Six theatre companies have been selected to take part in this year's festival.
已選定六個劇團參加今年的戲劇節。