The numbers that researchers get from the experiments can be _______, just like number puzzles.
-I have driven for so long, and now I want to have a rest. - _______ . _______ to drive.
He is always _______ his excellent spoken English; while his sister takes _______ her beauty.
In the last ten years, they _______ three great scientific experiments.
Look! Tony, your books are everywhere. Please put them _______ .
-Are you feeling _______ now? -Yes, and I feel much happier than ever.