题目内容：

    On a Tuesday afternoon in America's tech wonderland,Michael Feno,owner of Lucca Ravioli, stood outside his dear pasta restaurant,posing for pictures,his customers in tears.After 94 years, Lucca's doors shut on the last day of April 2019.A few blocks away,Borderlands Cafe closed the same day after 10 years in business.Owner Alan Beatts could not keep workers,even with a$15 minimum hourly wage.Who could live on$15 an hour in this city?

Tech is not what everyone talks about in San Francisco.It is money.Its estate(房地产）is the nation's costliest.A single-family home lists for$1.6 million,while$3,700 in monthly rent will get you a one-bedroom apartment.

For decades,this attractive city of hills,bordered by water on three sides,was a precious harbor for immigrants and artists.That's no longer the case.In a time of rare consensus(共识）， everyone agrees that something has become bad in San Francisco.

The city is rich in what other areas desire:start-ups,high-paying jobs,educated young people and rising property values.In the shadow of such wealth,however,San Francisco struggles with a homeless problem,which even forced Mayor London Breed to send a team to clean up human waste on the streets.

To many citizens,San Francisco has become unrecognizable in 10 years,as if it had received cosmetic surgery(整容手术）。It has less of what makes a city energetic.It has the lowest percentage of children of any major American city,and is home to about as many dogs as humans under the age of 18.To take a midday tour downtown is to be surrounded by an army of young workers,mostly white and male.Seeing a child who is learning to walk is similar to finding an endangered animal.

The city has also become less of a home to artists and musicians,because they cannot afford their practising spaces.How will the city create its next Grateful Dead or generation of Beat Writers? ＂Part of being an artist is being an observer of what's going on,says Victor Krummenacher,a member of a rock band who left the city in 2019 after 30 years."In this area,you're only stuck in the jam and costs.”

Everyone has a story about what is not here anymore:the inability to find a hardware store,a shoe repair or an independent music club.Businesses that were part of the memory,tradition and the lives of San Franciscans are being replaced with hipster(潮人）shops,which work to keep an artificial memory of its past.

1.The writer mentions the two restaurant owners in Paragraph 1 to introduce.

A.the way of keeping workers

B.the high costs in this city

C.America's Tech wonderland

D.their business life in this city

2.Paragraph 5 mainly tells us that

A.San Francisco is an energetic city with many dogs

B.Young workers often take a midday walk in San Francisco

C.many citizens in San Francisco have received cosmetic surgery

D.children make up a small part of the population in San Francisco

3.Grateful Dead in Paragraph 6 is probably the name of

A.a football team

B.a famous restaurant

C.a musician group

D.a government organization

4.What does the writer probably think of the life in San Francisco?

A.Disappointing.

B.Dangerous.

C.Colorful.

D.Traditional.

5.What can we infer from the passage?

A.The economy in San Francisco is turning for the worse.

B.The homeless people like to throw rubbish on the streets.

C.Many people can't afford the high costs in San Francisco.

D.Hipster shops keep the tradition of businesses in San Francisco.