The rice made _____ possible to produce one-third more of the crop in the same field.
The two animals come from the same family but differ __ body shape and breeding habits.
Please don’t ask me to solve mathematical problems; they are beyond my ____.
George always does his best, and that’s ______ I like about him.
The staff are excited that they have succeeded in what they ____ to do three months ago.
--- How’s everything going? --- _______________.