The teacher as well as the students planting trees

What did you say to Julia? I saw her crying in the dormitory alone. — It ______ my fault. We talked happily when I was with her in the classroom.

The boy is Jack and this is ______ jacket. ______ is yellow.

I am afraid I am not fit that job,for it is one ________ much patience,which I lack.

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