— Did Jack come back early last night?— Yes. It was not yet eight o’clock ______ he arrived home.
You’d better _____ some money for special use.
Many studentspreparing 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 career as a biology researcher.