My history teacher Jones is a teacher with rich __________ who has experienced different ways of life across the world. That’s to say, his students can get benefit from his ___________ from his world traveling.

Can you ________ your school library for me— Sure. It is big and clean. And there are many books. We often go there.

I ___ 5,000 yuan on this iPhone.—–Wow, so much! I can’t afford it.

Is Doctor Green________ORBIS doctor—No， he is________UNICEF volunteer. But he sometimes works with ORBIS.

We might as well try our best before quitting.—______! We should give it a try!