is one of the greatest scientists, who won the Nobel Prize for physics.

－I have great _____ in learning math and I’m so worried. Could you help me?－Sure. I’d be glad to.

– What’s the American English for “autumn” ? – __________. 

---- Are these your _______? ---- Yes, they’re my uncle’s sons.

---"Can you find me a good physics teacher?" ---"Yes, I know one with ______."