(5)The Northern Pike is a very bad fish.It is a big，hungry fish，and eats little fish.Many Northern Pike live in Lake Davis.Theyare killing all the smaller fish in the lake.TheNorthern Pike area serious danger to the lake because they eat all the smallerfish.Soon，all other kinds offish in the lake will be killed off.This is not healthyfor the environment(環(huán)境). Researchers are afraid that the Northern Pike，will swim out of LakeDavis through many smaller rivers that feed into the lake.They could spread all over the country and damage many other waterenvironments.If that happens，itwould be too late to stop the Northern Pike. For ten years.officials have been trying to remove theNorthern Pike from Lake Davis.They have tried usingnets and poisons(毒藥).However，the Northern Pike population is still doing well in Lake Davis.Many people do not like the idea of using poison to kill the fish.They worry that the poisons are bad for humans who use the water.However，people haven’t found any poisons atall in local(當(dāng)?shù)氐?wells. Scientists are going to try the poison again.This time，they will dry off the lake before puttingthepoison in.Apublic hearing will be held to talk about the problem.

　　(13)This text is most probably__________.

　　A. ashort story

　　B. anews report

　　C. flresearch paper

　　D. anofficial announcement

　　(14)What could happen if theNorthern Pike swim out of Lake Davis?

　　A. Theycould be out of control.

　　B. Thesmaller fish would be saved.

　　C. Theenvironment could be improved.

　　D. Manysmall rivers would be poisoned.

　　(15)What was the result ofusing poisons in Lake Davis?

　　A. Peoplestopped using the well water.

　　B. Thelake was seriously damaged.

　　C. Thepoisons worked as expected.

　　D. Therewere hardly any effects.

　　(16)A public hearing will beheld because __________.

　　A. localpeople object to the use of poisons

　　B. the NorthernPike have spread to other lakes

　　C. peopleare strongly against drying off the lake

　　D. theharm of the Northern Pike is seldom heard of