题目内容：

    "Tiny tubes and filaments （丝状物） in some Canadian rock appear to be the oldest known fossils， giving new support for some ideas about how life began，" a new study says．

"The features are mineralized remains of what appear to be bacteria that lived some 3.77billion to 4.28billion years ago，" the scientist said． That would be older than some other rock features found in Greenland， which were considered to be the fossils last August．

The new results come from examining rock found along the eastern shore of Hudson Bay in Northern Quebec． The filaments and tubes， made up of iron oxide called hematite （赤铁矿），appeared within a rock type called jasper （碧玉）．

Matthew Dodd of University College London， an author of the study published Wednesday by Nature， said the living things lived in the seafloor where water was heated by a volcano． "Since the fossils are nearly as old as Earth， which formed some 4.5 billion years ago， the findings support previous indications that life may have begun in such an environment，" he said．

He and his colleagues presented several lines of evidence to support the idea that tiny tubes and filaments are signatures of past life． But two experts who've previously reported similar findings said they are not convinced．

"I would say they are not fossils，" Martin J． Van Kranendonk of the University of New South Wales in Australia， who reported the Greenland findings last year， wrote in an email． "The paper's evidence for a biological origin falls short，" he said．

Abigail Allwood， a NASA geologist， said the authors have produced one of the most detailed cases yet made for evidence of life in rocks older than 3.5 billion years． But "It's an extraordinary claim to make and you do need extraordinary evidence，" she said．

1.What do Matthew， Martin and Abigail have in common？ ______

A. They have been studying rock features．

B. They are working in the same university．

C. They all made a contribution to the Greenland findings．

D. They have discovered the oldest known fossils in the same place．

2.How does Martin feel about the new study？ ______

A. It confirms the biological origin．

B. It ignores the Greenland findings．

C. It needs more to convince people．

D. Its authors take ideas and words from his．

3.What's Abigail Allwood's attitude toward Matthew's findings？ ______

A. Supporting． B. Disapproving．

C. Indifferent． D. Neutral．

4.The new findings can make people know something about ______ ．

A. the process of fossil formation

B. how life started on the earth

C. how to examine rock and find fossils

D. how the earth formed about 4.5 billion years ago