(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(环境). 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(毒药).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(当地的)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

　　(6)Even if your child is an excellent student，you can’t expect that hewill always dutifully do his homework.The following issome useful advice for helping them deal with their homework. Set a regular time and place for study.Give homework its ownspecial time and place，and if your child is in middleor high school，let her set her own timetable. Take it step by step.Children may getoverwhelmed(压倒)by too much homework they have to do.Encourage your child to calmly work out what needs to be done andhow much time it will take，and then make a plan.Help your child break homework down into manageable steps. Help out.You shouldn’t have to do your child’s homeworkor re—teach the material covered in class.but you canhelp out by showing your interest and by encouraging independent(独立的)problem solving. Praise a job well done.Kids，no matter what their age，need to know thatthey are doing a good job.Praise them for theirsuccesses and encourage them to keep up the good work.Alittle praise will go a long way in building healthy study habits.

　　(17)For whom is the textmainly written?

　　A. Parents.

　　B. Teachers.

　　C. Headmasters.

　　D. Students.

　　(18)What should a child beencouraged to do when having too much homework?

　　A. Havean interest in it.

　　B. Setenough time for it.

　　C. Askhis parents for help.

　　D. Do itin manageable steps.

　　(19)The text says thatchildren should be encouraged to__________.

　　A. managetheir own learning

　　B. expresstheir interest and care

　　C. askas many questions as possible

　　D. findsomeone to re-teach the lessons

　　(20)What can best helpchildren to keep on making progress?

　　A. Goingover the lessons with them.

　　B. Encouragingthem from time to time.

　　C. Helping them with study plans

　　D. Offering them a special place.