根据汉语提示完成下列句子，每空一词。
1. 昨天火车准时到达这儿了吗？
Did the train arrive here _____ yesterday？
2. 一个贼破门而入，偷走了他们的电脑。
A thief _____ _____ their house and stole their computer.
3. 老师已经开始讲课了，对吗？
The teacher has _____ _____ , hasn't she？
4. 八点了，请马上叫醒他。
It's eight o'clock _____ him _____ at once, please.
5. 今天会上有多少人出席了？
How many people _____ at the meeting today?
