He managed to reach the summit of his career, but it was at the _________ of his health.
Though the girl ____ to learn Japanese, she couldn’t catch up with her classmates.
It’s important for us to employ a word or a phrase according to the _____ in language studies.
I told Sally how to get here, but perhaps I ___ for her.
____ telephone is working here. You have to get them____.
While ___ along the street, I met an old friend of mine.