60. Once you get _______ something, it is very hard to ________.
This test ____ a number of multiple-choice questions.
He soon made _____ clear why he had asked for a conference.
There is no doubt _____ he will finish the task in time.
My brother is honest. He _____ such a thing.
—Which of the two books will you buy? — I’ll buy _____ of them, because I’m not interested in them.