________ from the moon, our earth with water ________ seventy percent of its surface looks like a blue sphere.

I’ll never forget the day _______ I bought my own guitar with my own money.

Physical Education in schools can teach us endurance — something we all need ______ life becomes tough

wish that you the party to be heldtomorrow, even though you are busy

______ difficulties we may face in our life, we should keep calm and take measures to get them over.