1. Seeing a cake flying through air, a lorry-driver who was drawing up alongside the car, pulled up all of a sudden.
    一个正把车开到那车旁边的货车司机看见一块蛋糕从空中飞来，突然把车刹住。

2. Sound travels through the medium fo air.
    声音通过空气作为媒介传播.

3. So, faced with the Danish advance, Alfred did not risk open battle but harried the enemy.
    因此，面对丹麦人的进攻，阿尔弗雷德没有贸然同敌人作战，而是采用骚扰敌人的战术。

4. She had told him to come straight in if ever she failed to open the door and to leave the bread on the kitchen table.
    她曾告诉过面包师，如果她不去开门，他可直接进门，把面包放在厨房的桌上。

5. She heard the front door open and heavy footsteps in the hall.
    她听见前门被打开，走廊里响起重重的脚步声。

6. Seeing a cake flying through the air, a lorry driver who was drawing up alongside the car, pulled up all of a sudden.
    司机看见一块蛋糕从天而降，紧急刹车。

7. She walked slowly into the hall and at once noticed that all the room doors were open,
    她慢慢地走进前厅，立即发现所有的房门都敞开着，

8. She quickly tore open the paper and drew out a printed card.
    她迅速将信封打开，从里面拿出一张印了字的卡片。

9. She did not, as her friend had feared, open the case.
    她没有像她朋友所担忧的那样将盒子打开。

10. She snatched the astonished Nicky up and held him high in the air.
    她一把抓起受到惊吓的尼克，把他高高举起来。