英語閱讀理解：For 170 years,members of a tiny American
For 170 years,members of a tiny American native tribe have lived and celebrated their traditions on a
small piece of land off the Louisiana coast called Isle de Jean Charles.They fished and they farmed,making living by hard work amid the bays and marshes（沼澤）.But now the waters that have supported them are threatening to overwhelm（淹沒）them.
“I don’t think we’re going to have any other choice except to leave because we’re getting washed away by every storm that comes by,” said Albert Naquin,chief of the Biloxi-Chitimacha tribe.“We have lost more and more land,and it keeps happening.”
Surrounded by the Gulf of Mexico on one side and the marsh on the other,Isle de Jean Charles sits at the southern tip of Louisiana’s rapidly disappearing wetlands,an area that is 3 to 4 miles long and about a mile wide.The tribe has been living here since 1840.but about a football field worth of land in the region is lost every half hour because of erosion（侵蝕）,storms and rising sea water-a constant process that is expected to worsen with climate change.
Isle de Jean Charles has been flooded five times in the last six years,being transformed from a once lush（繁茂的）landscape into a barren disaster zone.The floodwaters have spread large amounts of salt across the tiny island,making it nearly impossible for much to grow any more.
The road to their village has been flooded so often,and now only one narrow road is usable,which is often covered by water.The fire station was closed a few years ago,and the island’s church was relocated.Now,only 25 families are left,with a “few dozen” people.A controversial（有爭(zhēng)議的）$900 million system of sea walls to save endangered communities along the Louisiana coast raised hopes here.But the final design did not include Isle de Jean Charles because officials concluded it simply would cost too much to protect the relatively few families that were left.
72．What would be the best title of the passage?
A．Climate change threatens an American native tribe
B．Decreasing population of an American native tribe
C．The survival of an American native tribe
D．The harmful effect of climate change
73．We learn from the third paragraph that .
A．only a football field worth of land remains for the tribe
B．the southern tip of the wetlands is now in water
C．the tribe is losing its land at a fast speed
D．the tribe has lived here for 300 years
74．What do we know about the remaining land of Isle de Jean Charles?
A．It still remains rich and beautiful.
B．It is almost unsuitable for crops to grow.
C．There’s no resident living on the land.
D．All of them have been covered by water.
75．The last paragraph suggests that .
A．the govemment has paid much attention to the tribe
B．the tribe insists on remaining where they are
C．the fate of the tribe remains dangerous
D．the tribe has a large population