C．discover the association between Foxp2 protein and vocal communication

　　D．determine the reason why female rats are more talkative than male rats

　　4．Which of the following can be the best title for the passage?

　　A．Why women are the talkative sex

　　B．Tests on humans and rats

　　C．Sex differences in Foxp2 protein

　　D．Foxp2 protein determines oral ability

　　答案与解析

　　1．C　推理判断题。从第二段中Their findings came after it was previously claimed that ladies speak about 20,000 words a day...可知C项正确。

　　2．B　词义猜测题。从画线句句意可知B项正确。

　　3．C　细节理解题。从第二段最后一句In their study, the researchers attempted to determine what might make male rats more vocal than their female friends.可知C项正确。

　　4．A　标题归纳题。从全文内容可知A项正确。

　　Ⅱ.完形填空

　　It was Mother's Day and I was shopping at the local supermarket with my fiveyearold son, Tenyson. As we were__1__， we realized that only minutes earlier an __2__woman had fallen over at the entrance and hit her head on the ground. __3__was with her, but there was blood everywhere and the woman was embarrassed and clearly in shock.__4__，a lot of people stopped to help out.

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