________ his strength failed and he dropped behind in the race.

There’s no way of knowing why one man makes an important discovery ___ another man, also intelligent, fails.

In dealing with public relations, we should make every effort to prevent the _____ in personality.

---Hello, I want to book a table by the window. ---Sorry, sir. All the tables by the window have been _______. Will other ones be OK?

—Do you have anything planned for this afternoon?　 —Yes. I’m going to ________a famous NBA player.