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?