的"Tornadoes generally occur near the edge of a thunderstorm ..."可知龙卷风起源于雷雨。

　　答案：C

　　2．解析：词义猜测题。根据第二段的首句"Some tornadoes can be seen clearly ..."可知有些龙卷风可以很清楚地看到，而有些龙卷风被"rain or nearby low－hanging clouds(雨或浮云)"遮挡而看不清楚。

　　答案：A

　　3．解析：细节理解题。根据第三段的"...the air may become very still."可知C项正确；根据"A cloud of debris(散片)can mark the location of a tornado ..."可知D项正确；根据"...when the strong wind may die down."可知A项正确；因此看不到的现象应为B项，注意本段末句"It is not uncommon to see clear，sunlit skies behind a tornado."的含义是"在龙卷风过后，常能见到阳光照耀的晴朗天空"。

　　答案：B

　　4．解析：细节理解题。根据第三个事实中的"Waterspouts are tornadoes that form over water."可知有些龙卷风是来源于海面。

　　答案：C

　　5．解析：推理判断题。根据第二段中的"At many times，tornadoes develop so rapidly that little，if any，advance warning is possible."可知很多时候龙卷风来得太快，以至于不可能提前发出警告，因此A项错误而D项正确；B项根据第一段首句可知错误；C项根据末段可知错误。

　　答案：D

　　Ⅵ.七选五阅读

　　Listening is an essential part of communication, and it is different from hearing. Being a good and patient listener helps you not only solve many problems at work or home, but also to see the world through the eyes of others, thereby opening your understanding and enhancing your capacity for empathy.

　　Place yourself in the other person's shoes. Active listening is not about inward thinking. Instead, you must look at the problems from the other person's perspective and actively try to see his or her point of view. It is not a good idea to consider yourself to be smarter than the speaker and assume that if you would have been in his or her shoes, you would have seen your way through the problem much faster. __1__

　　Create a conducive physical and mental space. Remove all distractions. __2__ Turn off cell phones. It may be easiest to arrange to talk somewhere that distractions will not occur. Quiet your mind and open yourself to whatever the person might have to say.

　　__3__ It might sound obvious and trite, but one of the biggest obstacles to listening, for many people, is resisting the impulse thoughts. Likewise, many think that empathy means sharing with the listener similar experiences that the listener has had.

　　Follow and encourage the speaker with body language. Nodding your head will indicate you hear what the speaker is saying. __4__ Adopting body postures, positions and movements that are similar to the speaker will allow the speaker to relax and open up more.

　　Do not interrupt with what you feel or think about the topic being discussed. Wait for another person to ask your opinion before interrupting the flow of discussion. Active listening requires the listener to shelve his or her own opinions temporarily, and await appropriate breaks in the conversation for summarizing. __5__ Besides，if he or she takes your advice and something goes wrong, he or she will be likely to blame you.

　　A．Give all of your attention.

　　B．Try to reassure the speaker that all is well.

　　C．Stop talking and try to be silent.

　　D．Avoid giving direct advice.

　　E．And it will encourage them to continue.

　　F．Ask meaningful and empowering questions.

　　G．Remember you have two ears and one mouth for a reason.

答案：1－5　GACED