听力音频：

Questions 31-40

Complete the table below.

Write ONE WORD ONLY for each answer.

Desert Animals

Topic	Aim	Research object	Conclusions
the 31……… between two species	to see how species 32……… in a desert	lizards and mice	● They both feed on 33……… ● They 34……… with each other for food sometimes
the 35……… between two species	to see how animals obtain extra 36………	kangaroos and locusts	● Kangaroo’s 37……… has increased ● The 38……… of locusts is enlarged
The cooperation between two species	To see if some plants provide 39……… for ants	fire ants and some plants	Particular plants may be treated as 40……… by some ants