mbers that researchers get from the experimentscan be _______, just like number puzzles.

_____ do they exercise— Twice a week.

Happy Teachers’ Day! Here are some flowers for you. — beautiful flowers they are! Thank you!

We were scared to death when the fire _______ . Fortunately, it was put out before it caused much damage.

After knocking down the old man, the inhuman driver left the accident scene in a hurry, the law to punish him.