完成句子：根据中文意思，完成下列句子，每空限填一词。
1. 我通常在六点钟起床。
I usually ________ ________ at 6 o'clock.
2. 维克斯在车站等谁？
Who is Vickers ________ ________ at the bus stop?
3. 你妈妈每天洗衣服要花多长时间？
How long does it ________ your mother to ________ the clothes?
4. 这条河不像过去那样干净了。
The river isn't as clean as it ________ ________ be.
5. 你曾经和父母吵过架吗？
Have you ever ________ ________ your parents?