The teacher asked Mary not to prevent Tom from ______(表达) his opinions.
All his __________ (亲戚) came to celebrate his birthday.
He has been suffering __________ (剧烈的) pain in his stomach.
It is __________ (考虑周到的) of you to prepare so much for us.
It is my __________ (特权) to call him my friend.
The writer's name has been __________ (提到) several times in this article.