I find ________ difficult to remember everything, though I’m still young.
Some supermarkets are open _______8 :30 a. m. and 8 :00 p. m. ______ Mid-autumn Day.[ ]
Don’t forget _____ the door when you leave.
He will never give up________difficulties he has.[ ]
Oh, the music is wonderful. Would you please _______ the radio?—All right.