He seems to be doing nothing, buthe is just waiting for his chance

Only when I got here _________ that I had made a big mistake.

Do you think it wise for Chinese mothers to try to do everything for their children?-No，that’s ________ they are mistaken[ ]

Did you have a wonderful time at the ball lastnight— ____ ! I’ve never had a more wonderful time all mylife

What’s your best friend like— He _____________.