托福考试

【单选题】Because Mars is farther from the Sun than （）, Mars takes longer to complete a revolution. 
A. Earth is 
B. is from Earth 
C. what is Earth 
D. is it Earth 

【单选题】whEn swollEn By mElting snow or hEAvy rAin, somE rivErs routinEly ovErFlow its BAnks.

【单选题】thE sEnsAtion oF sounD is proDuCED how viBrAtions trAnsmittED through thE Air strikE thE EArDrum.

【单选题】 Paleoanthropologists examine fossil remains of extinct primates, while physical anthropologists concernwith ethnology study the behavior of primates intheir natural settings.

【单选题】 Seismic waves generated by an earthquake or large explosion can be recorded thousands of kilometer from their source.