完成句子。
1．He _______________（瞥） the envelope and recognized his uncle’s handwriting.（glance）
2．_______________（有一种趋势）people to work at home instead of in offices.（there, tendency）
3．He _______________（主张改良）the prison system.（advocate）
4．As they worked harder, their marks _______________（在一般水平以上）.（average）
5．The custom of arranged marriages _______________（仍存在） in many countries.（exist）
6．The noise is so loud that I_______________（不能忍受）.（put）
7．She will go to his birthday party_______________（只要她被邀请）.（as）
8．_______________（在这种情况下）, you’d better not tell him the bad news.（circumstance）
