Mr.Smithgradually_____aknowledgeofthesubject.
下面句子中没有语病的是
Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野
Amythical(imaginary)creature,thedragonwasbelievedtohavelion'sclaws,scalyskin,andfierybreath.
ThefirstimportantexpositionintheUnitedStateswasheldinPhiladelphiain1876.
