Dad. Why I should stop__________ computer games? —For your health, my boy, I’m afraid you _____________.

We read the number 8,479 as .

Only after he had spent several nights working on the math problem_______to wonder whether the problem was wrongly set．

We have sweaters _______ all colors _______ ￥50 each. [ ]

I was still sleeping when the fire ___________, and then it spread quickly.