The couple decided to ____________ a child because they couldn’t have babies.
You’d better _____ some money for special use.
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.