27. I find it astonishing that she _____ treat you like this in public.
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.
The two girls had been talking in ________ low voice all ________ time during the meeting, which upset the manager.