用所给单词的适当形式填空。
1. He is one of the top ___ (chef) in the restaurant.
2. I think that paper is the most useful ___ (invent).
3. 1 wish all of you a____ (please) journey.
4. We should take an____ (act) part in all kinds of outdoor activities.
5. We learn history in school and may know about something before a few __ (century).
1. chefs 2. invention 3. pleasant 4. active 5. centuries