The frighten boy lay in bed quietly, with his eyes____ on the wall, saying nothing.

With a lot of difficult problems ____, the newly -elected president is having a hard time.

With nothing ________ to burn, the fire became weak and finally died out before the firefighters came.

         to looking after her sick mother for two years,she badly needed a holiday.

---Come on, let’s go for a drink. ---Sorry. With so many problems _____ my mind, I can’t take a break.