人教版必修五 Unit 1 Great scientists 第一课时

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
 
Taking your pet for a walk should be ___【小题1】____ enjoyable experience, not one which leaves your arms ____【小题2】____ (pain) after your dog running too far away, reaching the end of the dog leash (狗绳). Some dogs _【小题3】 (simple) will keep trying to pull ____【小题4】__ (them) away from the leash, and ____【小题5】__ (depend) on the size of the dog, this can cause much pain to your arms.
 
Now there is a tool ____【小题6】__ (call) the Dog Trainer which will probably solve these dog walking issues. For $39.95, the special invention is designed to help train your dog ___【小题7】___ you go out for walks. The tool is fixed with the leash, and whenever it senses a struggle, it will send a noise which only your dog will be able to hear, thus forcing it ___【小题8】__ (realize) that struggling is not worth it!
 
The noise becomes ___【小题9】__ (loud), based on the force of the struggle, and it has four sound levels. The Dog Trainer is powered by two AAA batteries (电池) and we believe if you have a large dog, ___【小题10】___ likes to try and escape all the time, then this handy little invention is surely worth the small payment.