Everyone knows that _____ sun is in the center of thesolar system（太阳系）

. His stepmother is kind to him, ______ whom she has a deep love.

Drink-driving has ____ many traffic accidents , so the government made new laws to forbid it .

25．Putting the worries out of her mind，Mary turned her efforts__________the evening meal．

Have you heard of that Tom recently bought a new car and anexpensive flat –________ He even couldn’t have enough money topay for the rent