Why does the writer say 'You might be forgiven for thinking that...'?
A．Solving the mystery of sleeping and waking requires new insights.
B．Most of the other things people do regularly are biologically straightforward.
C．The problem sounds rather grand.
D．We still lack for progress though we've spent much more time studying it.

未分类题______, if he doesnt learn he knows nothing.A．A man is ever so cleverB．Be a man ever so cleverC．So clever as a man ever isD．No matter how a man is clever

未分类题If one travels on the Mediterranean cruise in the future,A．he she will become a cheapskate.B．it will cost him her more money.C．it will become more economical.D．there will be no free services.

未分类题You will see to______the engine does not get out of order.A．thatB．howeverC．it thatD．which

未分类题The authors biggest worry about using nuclear energy is that_____.A．it will do great harm to the inadequate reserves of coalB．it is deadly if terrorists attack a nuclear plantC．it will limit the development of many other alternativesD．there will be a wider gap between developed and developing countries

未分类题______ when Shanghai was the paradise for imperialist adventurers.A．Gone are the daysB．Are the days goneC．Gone the days areD．Are gone the days