用方框中所给动词的适当形式完成下列句子。

enjoy, die, brush, want, start

I            my teeth three times yesterday.
When I was a child, I __ to be a doctor.
We            our vacation last year. We stayed at a very nice hotel.
Amy’s grandfather __ when he was 90 years old.
The concert          at 7:30 and ended at 10:00.