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?