Being afraid of falling behind the times, he has always been keeping himself ___ of the latest development of technology. A. instructed B. intended C. informed D demanded
We human beings should be very careful with what we do with nature, _____power is beyond our understanding.
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
Everybody in the village likes Jack because he is good at ______ and telling jokes.
Kidswillbe______abouteverythingwhentheyreacha certainage.
Mary said she was by no means angry; ______, she was glad to be able to make herself clearly understood.