The kid is crying, for he ______ jump over the ditch on his own.
Many students preparing for the midterm examination.
________ from space, the earth , with water_______ seventy percent of the surface , looks like a blue ball.
The news has spread all over the country _____ the spaceship succeeded in returning to the earth.
— 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.