托福考试

【单选题】 Some critics maintain （） the mystery novel is a symbolic ritual of guilt and retribution. 
A. is that 
B. that there is 
C. it is 
D. that 

【单选题】 In the orbit of a planet around the Sun, the point closest to the Sun is called it the perihelion.

【单选题】 According to the author, all of-the following evidence relating to the first birds was found EXCEPT
A．( nesting materials
B．( four skeletons in good condition
C．( two fragmented skeletons
D．( a single feather

【单选题】 Why does the author mention "a crow" in line 12
A．( to indicate the size of Archaeopteryx
B．( To specify the age of the Archaeopteryx fossils
C．( To explain the evolutionary history of Archaeopteryx
D．( To demonstrate the superiority of the theropod to Archaeopteryx

【单选题】 The passage mentions that the tropics differ from the Earth's polar regions in which of the following ways
A．( The height of cloud formation in the atmosphere
B．( The amount of heat they receive from the Sun
C．( The strength of their largescale winds
D．( The strength of their oceanic currents