单项选择题

The tone of the passage is ______.

A．critical but hopeful
B．hopeful but suspicious
C．suspicious but speculative
D．speculative but hopeful
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单项选择题
The passage supports the inference that ______.
A．Einstein's theory of relativity is wrong
B．the Lorentz-Fitzgerald formulas contradict Einstein's theories
C．time travel is dearly possible
D．it is impossible to travel at precisely the speed of light
单项选择题
According to the author, it is too soon to ______.
A．call Beethoven a physicist
B．adopt proposals such as Zuckerkandl's
C．plan for time travel
D．study particle chambers for tachyon traces
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