Teachers have to constantly update their knowledge in order to maintain their professional __________.
The director had her assistant ___ some hot dogs for the meeting.
If the weather had been better, we could have had a picnic. But it ____ all day.
——Could I ask you a rather personal question?——Sure, ____.
——What are you reading, Tom?——I’m not really reading, just ___ the pages.
It’s not ___ good idea to drive for four hours without ___ break.