The bell rang ______ the teacher was explaining the answer to the students.

he newly-discovered star wasnamed _____ a Chinese astronomer ________his contributions to astronomy.

My mom once worked in a very small village school, which isonly on foot.

My good friend Rose went to the party with her husband, ________ a happy evening of wine, food andsong.[ ]

Do you notice the man ______ is sitting under thetree He is our new teacher.