---- Have you ever seen a dictionary ____________ our school library? ---- Yes, it is over there and Mary is using it.

---He spent as much time as he could __________ his spoken English. --- Wish him good luck !

More than a quarter of the energy       in the United States goes to moving people and goods from one place to another.

.They will start their project ____at helping the poor children to be educated in China＇s west.

The sun began to rise in the sky, ________ the mountain in golden light.