Great scientists don't ________ graduate from well-known universities. Some didn't even attend school a year in total.
---Poor John! I could hardly recognize him just now! ---_______. He has changed so much.
---You keep on coughing. What’s the matter? ---Oh, I’ve got a cold. Nothing serious, _______.
---I’m sorry that I didn’t work out this problem. ---It’s _____our ability. I didn’t work it out, too.
John received an invitation to dinner, and with his work ______, he gladly accepted it.
— Is it OK if I take this seat? —Sorry,___________.