1. Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
    大家都知道，在墙壁或山腰附近发出的喊声，就会听到回声。

2. Before returning home at night, he took a shower and changed back into his suit.
    晚上回家前,他洗个淋浴,又换上他那套西装.

3. But her teammate almost dropped it. Wilma had to stop to get a good hold on the stick.
    但是她的队员已经掉了, 威尔玛不得不停下来抓住接力棒。

4. Because of this, we kept looking back, wondering if we were leaving a trail of oil and petrol behind us.
    因此，我们不时地掉过头，怀疑车后是否留下了机油和汽油的痕迹。

5. Before we had time to worry about what might happen, we were back on the plain again.
    我们还未来得及担心后果，车已重新开上了平地。

6. Before returning home at night, he took a shower and changed back into his suit.
    晚上回家前，他洗个淋浴，重新换上那身黑色西服。

7. By January 10th, I was back to where I had started from.
    到了1月10日，我恢复了原来的作息时间。

8. Bagrit foresaw a time when computers would be small enough to hold in the hand,
    巴格瑞特预示有一天计算机可以小到拿在手上，

9. Back in the train, we told each other what a wonderful time we had had that day.
    回去的火车上，大家都说，这一天过得真愉快。

10. But I am going to buy them all back again now!"
    不过现在我要把这些东西一一买回来。”