He is always helping people without expecting anything _____.
After retirement, learning a musical instrument may be harder than ______ when you were a kid.
We cannot figure out ______ quite a number of students were infected with the flu.
I ______ of your trying to earn some money, but please don’t ignore your studies.
The boss ______Mary to finish her job within a week.
Maggie is a neat and tidy student, who likes to have everything ______.