I need time to _______ on what the teacher taught in class.
— What do you think I should do? — I think you should call him back_______.
Mr. Green kept ______ and complete records of all his business expenses.
It is a fact that there is a (n) _______ towards regional cooperation.
Mom is coming. What present ________ for your birthday?
I am sorry, sir, but that kind of digital camera is no longer _______.