—Recent pressure at work may ______ his behavior.
Many students preparing for the midterm examination.
________ from space, the earth , with water_______ seventy percent of the surface , looks like a blue ball.
— What made her so sad?— _____ she failed in the examination.
Honestly speaking, it is my teacher’s _____ that made me finally take up my present careeras a biology researcher.
-- Can you persuade him out of the foolish idea?—_______ no point in doing so—he’ll never change his mind.