______some people are motivated by a need for success, others are motivated by a fear of failure.
Because
If
Unless
While
Only when you leave school________how much you love it.
So mysteriously ______ missing that many puzzles wait to be solved.
For a moment nothing happened, and then ______ all shouting together.
---I have finished my homework. ---___________.Let’s go to play tennis.
— Did you know any French before you arrived in Washington? — Never ______ it, actually.