His words puzzled me so much that I had a hard time trying to ______ what he really meant.
The system has been designed to give students quick and easy________to the digital resources of the library.
________, as long as I’m with nature, I don’t care.
you don't like him is none of my business.
A few years ago the belief became general________orange juice and milk should never be drunk at the same meal.
One more day,________I’ll get everything ready.