an’t concentrate on his lessons recently—-Yes, that might _____ his low score in the lasttest

It was a pity that the great writer died _______hisworks unfinished.

The manager was worried about the press conference his assistant _______in his place, but luckily, everything was going on smoothly.

I often have ____ egg and a glass of milk for ____ breakfast every day.

Jenny is a good teacher of ______. She teaches ______ English