Lesson Three is Athe most difficult lesson, Bbut it isnt Cthe most difficult lesson Din Bo

Which of the following is INCORRECT？A．Radio, television and press are the most three commo

AThe harder he worked, Bthe most troubles he Chad in his early days of Dresearch.A．B．C．D．

AThe reason Bwhich he Cwas absent from school yesterday is Dthat he was ill.A．B．C．D．

AThe Great Wall is Bso a well－known Ctourist attraction that Dmillions of people pour in e

Of the three cavities. ______is the most variable

Winning three gold medals is the most remarkable (achieve) ______ he has made so far.