完成句子：请根据中、英文提示完成下列句子，并把答案写在横线上。
⑴我认为你不对。
I___________________ you are right.
⑵她的姐姐长大以后想要成为一名艺术家。
Her sister _____________________________ an artist when she grows up.
⑶他们在找什么？
What are they__________________?
⑷明天他将写完那封信。
He___________________the letter tomorrow.
⑸昨天老师告诉我们放学后要打扫教室。
Our teacher ________________________the classroom after school yesterday.