1.When you volunteer to join in a project,you are advised to 　. 

　　A.build something and walk away

　　B.make good preparations in advance

　　C.avoid involving locals in activities

　　D.depend on yourself to solve problems

　　2.According to the author,volunteering will 　. 

　　A.reduce challenges in the world

　　B.determine the future of a volunteer

　　C. change a person’s opinion of the world

　　D.benefit volunteers most in their learning

　　3.What is this passage mainly about?

　　A.What you prepare to become a volunteer.

　　B.Where volunteers are needed most in the world.

　　C.Why volunteering is popular with young people.

　　D.How volunteers develop a relationship with local people.

　　B

　　(2017·东北三校第一次联考)

　　Welcome to the world of multitasking—a place where the measure of a person is how many jobs they can perform at the same time.In fact,if experts are to be believed,multitasking is a disastrous idea.

　　One of the opponents of multitasking is Dr. Clifford Nass,a professor at Stanford University.“People who multitask frequently are less able to pay attention;they’re worse at managing their memory,”he said.In his opinion,the loss that we get with multitasking is harmless in some situations,for example,part of doing business in the digital world;but you can’t do serious work like writing,thinking or solving an important problem this way.You do worse even as you think you’re doing better.All the time the research points to a simple fact:the brain cannot cope.When you stop midway through composing a report to check an email,you force your brain to stop and regroup.It is like pressing the pause button during a movie,meaning the film takes longer to watch.

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