I have an appointment ________ Dr.Smith,but I need to change it. (2013·北京,26)
How proud she is! She has been ________ Beijing University.
I used to quarrel a lot with my parents, but now we ________ well.
---- She looks happy. She ________ have passed the exam. ---- I guess so. It’s not difficult after all.
Scientists have to work hard to keep ________ with modern discoveries and developments.
The child was told to ________ for being rude to his uncle.