单词拼写（每小题1分，共5分）
根据句意、首字母或汉语意思完成单词。
They hoped to a            their aims by the end of the year.
The football      (a person who trains sportsmen for games) is popular among us.
My aunt is one of the best             (秘书)of this big company.
The___(扩散) of the information has become much faster because of the Internet.
The country has __________(发展) so fast since five years ago.