He works incredibly hard and yet needs very little sleep—he must have a strong______.A．con

__________ he works hard,

he was tired,（)he still worked hard. A. Though; but B.Though; and C. Though;／ D.Althou

Jack is an intelligent pupil, but he lacks __________ for working hard and becoming a

Jack London worked very hard and finally he _______ success.A、madeB、foundC、soughtD、achi

______tired after the hard work, he fell into bed and went straight to sleep.A．FeltB．Feeli

He didn ______ and so he failed the examination.A.work enough hardB.work hard enoughC.ha