Ⅰ.阅读理解
Dozens of dolphins swam out of the polluted waters of Haifa harbour on Tuesday.This was the first time that dolphins had visited this crowded Mediterranean port, and researchers were surprised and delighted by the unexpected event.
Between 40 and 50 of the dolphins appeared in the busy port on Tuesday morning，obviously drawn by the fishrich waters of Haifa Bay.
However, the bay is also full of harmful chemicals.Aviad Sheinin, professor of Haifa University's Maritime Studies Department，said he didn't think the dolphins were harmed by the pollution，but that he hoped they would swim back to sea soon.“It seems that they are quite relaxed.They don't seem to be stressed，”he said.
Haifa Bay is lined by chemical companies that have been pouring poisonous waste into the water for decades.While pollution levels have dropped in recent years, the water is still considered a health hazard (隐患)．
“There are lots of fish in Haifa port.Unfortunately we couldn't tell the dolphins that the fish are not healthy，and I don't know what the result will be，” he told Israel Army Radio.
Hundreds of Haifa residents gathered around Haifa Bay to see the interesting sight，and researchers said this provided a rare chance to film and study the roughtoothed dolphins.In addition to the dozens of dolphins which swam into the port on Tuesday，a similar number stayed outside the breakwater (防波堤)．Later Tuesday the dolphins left the port but remained near the entrance and Israel's coast guard was patrolling (巡逻) the area to try to make sure the dolphins didn't reenter the poisonous waters.
Relatively little is known about roughtoothed dolphins, which are usually found in deep and warm tropical waters.
本文主要讲一群海豚出乎意料地游到了被污染的水域，最后又游走的事情。
1．Haifa Bay is full of harmful chemicals which are caused by .
A．unhealthy fish B．ships
C．chemical companies D．residents living nearby
答案：C
解析：根据第四段第一句可知这些有害的化学物质是化工厂排放到河中去的。
2．Aviad Sheinin's words suggest .
A．he is curious about the dolphins
B．the dolphins might affect the existence of fish in Haifa port
C．he will do research on the dolphins
D．he is uncertain about what will happen to the dolphins
答案：D
解析：根据第三段第二句“...he didn't think...but that he hoped they...”及第五段中“and I don't know what the result will be”可推知他不确定这些海豚最终会怎样。
3．When learning the dolphins entered Haifa port，hundreds of Haifa residents .
A．were curious
B．felt upset
C．went to drive them away
D．were shocked
答案：A
解析：根据倒数第二段第一句“Hundreds of Haifa residents gathered around Haifa Bay to see...”可知他们很好奇，都跑去观看。
4．This passage mainly tells us that .
A．dolphins are well protected in Israel
B．Haifa Bay is full of harmful chemicals
C．dolphins made a surprise visit to the polluted harbour
D．people love dolphins
答案：C
解析：本文第一段为事件的总述，结合下文可知本文主要讲一群海豚出乎意料地游到了被污染的水域，最后又游了出来。
