Ants know when an earthquake is about to strike，researchers have discovered．Their behavior changes significantly prior to the quake and they resume normal functioning only a day after it．Gabriele Berberich of the University Duisburg-Essen in Germany presented these findings on Thursday at the European Geosciences Union annual meeting in Vienna according to LiveScience．
   Berberich and her colleagues discovered that red wood ants preferred to build their colonies right along active faults in Germany．They counted 15，000 mounds （土堆）lining the faults．These faults are the places where the earth violently bursts in earthquakes．
   Using a special camera that tracked changes in activity．Berberich and her colleagues tracked the ants round the clock for three years，2016 to 2019．They found that the ants' behavior changed only when the quake was over magnitude （級(jí)數(shù)）2．There were 10 earthquakes between magnitude 2.0 and 3.2 during this period，and many smaller ones．Humans can also sense quakes of over magnitude 2 only．
   According to Berberich，normal ant activity consists of going about collecting food etc．during the day and resting in the night But before an earthquake，the ants didn't go back to their mound in the night and moved around outside it．This strange and abnormal behavior continued till a day after the earthquake，Berberich told a news conference，according to Livescience．
   How do ants know an earthquake is coming？Berberich suggested that they could either be picking up changing gas emissions or noting tiny changes in the Earth's magnetic fields （磁場(chǎng)）． "Red wood ants have special cells which can detect changes in carbon dioxide levels．They also have special cells for detecting electromagnetic fields．" she said．Berberich and her colleagues are planning to continue the research in areas where there are more and bigger earthquakes

（1）What's the meaning of the underlined word "resume" in Paragraph 1？

C

C

A．Form．
B．Avoid．
C．Recover．
D．Improve．
（2）What's the function of the first paragraph？

A

A

A．To lead to the main topic．
B．To describe a new species of ant，
C．To introduce a famous researcher
D．To tell how to predict an earthquake．
（3）What happens to the ants before an earthquake？

D

D

A．They have no appetite．
B．They are too excited to rest．
C．They get lost on their way home．
D．They refuse to go inside their nests．
（4）What can we conclude from the last paragraph？

C

C

A．Ants can only detect smaller earthquakes．
B．The result of the research is completely reliable．
C．Ants may have two ways to predict earthquakes．
D．Researchers don't know how ants predict earthquakes．