1. Suddenly they came to a waterfall which dropped into an underground lake at the bottom of the cave.
    突然，他们来到一道瀑布前，那瀑布奔泻而下，注入洞底一处地下湖里。

2. Suddenly my wife spotted a boat moored to the bank.
    突然，妻子发现岸边泊着一条小船，

3. Suddenly a raft appeared, looking rather like Noah´s ark, carrying the whole family, a few hens, the dogs, a cat, and a bird in a cage.
    突然，出现了一只筏子，看起来很像诺亚方舟，上面载着他们全家老小，还有几只母鸡、几只狗，一只猫与一只鸟笼，那里头有一只小鸟。

4. Suddenly, one of the children kicked a ball very hard and it went towards a passing boat.
    突然，一个孩子狠狠地踢了一脚球，球便向着一只划过来的小船飞去。

5. Suddenly someone shouted, ´It´s two minutes past twelve! The clock has stopped!´
    突然有人喊道："已经12点零2分了！那钟已经停了！"

6. Suddenly, they heard a voice behind them.´ what´s up? What´s up?´someone called.
    突然他们听到身后有声音。"什么事？什么事？"有人叫着。

7. Suddenly, a middle-aged lady got on the train and sat opposite Sally.
    突然，一个中年妇女上了火车，坐在萨莉的对面。

8. Suddenly, she saw a man near a bus stop.
    突然，她在公共汽车站附近看到一个男人。"

9. Suddenly the church clock struck twelve.
    突然，教堂的钟声敲响了12下。

10. Suddenly a big bear ran out from behind the tree.
    突然，一只大熊从一棵树后面跑出来。