________in his online games, I am afraid, may lead to his failure in this mid-term exams.
People here see this kind of bird as a _______ of hope, so they never shoot them.
A great many visitors come to visit the church ________ the 13th century, which has brought large income to the local government.
Was it at the school ______ was named after a hero _____ he spent his childhood?
_____ in a heavy rain, the teacher fell ill and couldn’t but ______ for a leave.
Mr. Richard hasn’t got any time to play golf these days, because he is ______ in the research of bird language.