单项选择题

It can be inferred from the passage that scientists now generally agree that the ______.

A．enormous wingspan of the pterosaurs enabled them to fly great distances
B．structure of the skeleton of the pterosaurs suggests a close evolutionary relationship to bats
C．fossil remains of the pterosaurs reveal how they solved the problem of powered flight
D．pterosaurs were reptiles
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单项选择题
The author views the idea that the pterosaurs became airborne by rising into light winds created by waves as ______.
A．revolutionary
B．unlikely
C．unassailable
D．probable
单项选择题
It can be inferred from the passage that which of the following is characteristic of the pterosaurs
A．They were unable to fold their wings when not in use.
B．They hung upside down from branches as bats do before flight.
C．They flew in order to capture prey.
D．They were an early stage in the evolution of the birds.
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