______ hAs riDDEn on A rAilwAy trAin knows how ______ AnothEr trAin FlAshEs By whEn it is trAvEling in thE oppositE DirECtion.
A．AnyonE who; rApiD
B．whoEvEr; rApiDly
C．Anything thAt; rApiD
D．whAtEvEr; rApiDly