阅读下面材料，用括号内单词的正确形式填空。
1．Either the guides or the team leader ________(be) looking after the students then.
2．It is important to remember that success ________(be) a sum of small efforts made each day and often ________(take) years to achieve.
3．The teacher and writer, as well as many guests ________ (invite) to the party held yesterday.
4．Playing a role in the hit show “Daddy，Where Are We Going？”，Kimi，together with the other four kids，________(be) popular with many teenagers now.
