根据句意和汉语注释，写出单词的正确形式。
Mr. Green received a new mobile phone on his                (四十) birthday.
Maybe the overcoat belongs to one of the                 (消防队员) .
CCTV-9 is looking forward to                (采访) the new president of the USA.
This tall building was built two                (世纪) ago.
Many young people are             (积极地) looking for jobs.