— What do you think will prove to be the best thing that has ever happened to you? — ______.
If I were any younger,I would do ________I am interested in.
There is no need______,because the flight has been canceled.
I hear they've promoted Tom,but he didn't mention______ when we talked on the phone.
Stage fright is a common example of ________educators call a“lack of confidence”among students.
It's surprising that your brother ______Russian so quickly—he hasn't lived there very long.