What opinions did experts have about movements and transportation throughout history?

Take a look.

小题1:Which of the following experts was a science fiction writer?

A．Lord Kelvin

B．Lee Deforest

C．Leonardo da Vinci

D．Jules, Verne小题2: Leonardo da Vinci’s opinion was that _________.

A．airplanes would never fly

B．no person would ever reach the moon

C．people would fly in a machine with an overhead propeller

D．people would be able to travel under water in airtight ships小题3: How many experts’ opinion proved right according to the passage?

A．One

B．Two

C．Three

D．Four

The police still haven’t found her, but they’re doing all they _____.

A．may

B．can

C．must

D．will