Upon entering a little country store，the stranger noticed a sign warning，“Danger！Beware of dog！”it posted on the glass door。Inside，he noticed a harmless old hound dog sleeping on the floor beside the cash register。
“Is the dog that folks are supposed to beware of？”he asked the owner。“Yep，that's him。”came the reply。The stranger couldn't help but be amused。“That certainly doesn't look like a dangerous dog to me。Why in the world would you post that sign？”
“Because。”the owner explained，“Before I posted that sign，people kept tripping over him。”
在进入一个乡村小店的时候，陌生人注意到玻璃门上贴的一个警告，上面写着：危险！小心有狗！他发现店里面收银机旁边的地板上睡着一条看起来没有任何恶意的老猎狗。
他问店主：“我们要当心的就是那条狗吗？”店主回答：“是的。就是它。”陌生人不禁有些吃惊，他说：“我觉得那条狗看起来一点也不危险。你究竟为什么要贴那样一条警告呢？”
店主解释道：“那是因为在我贴警告之前，总是有人被它绊倒。”
1.folk n。人们
2.trip n。旅行，差错
Is this your first trip to Europe？（这是你第一次到欧洲旅行吗？）
v。绊倒，犯错误
Move this box or someone might trip over it。（把这个纸箱搬走，否则有人可能会被它绊倒。）
1.beware of 对……小心；谨防……
You should beware of strangers。（你必须提防陌生人。）
2.cash register 现金出纳机，收银机
I was sitting by the cash register。（我坐到收银机旁。）
3.couldn't help but 禁不住，忍不住
Performers are so funny that we couldn't help but keep laughing。（表演者是如此的搞笑，以致于我们忍不住不停地大笑。）
4.in the world 到底，究竟
What in the world should I do now？（现在我到底应该怎么办？）自我测验3：
1.The girl is not happy at the new school。She hasfriends there。
A。fewB。a fewC。littleD。quite a few
2.I can't find the recorder in the room。Itby somebody。
A。must have takenB。may have taken
C。may have been takenD。should have been taken
3.I would appreciateback this afternoon。
A。you to callB。you callC。your callingD。you're calling
4.is a good form of exercise for both young and old。
A。The walkB。WalkingC。To walkD。Walk
5.It is no useme believe you。
A。trying makingB。trying to makeC。trying to forceD。to try to make
6.，his face turned pale。
A。Hearing the newsB。When hearing the news
C。Having heard the newsD。After he heard the news
key：1-56
