It is said in the book that Thomas Edison (1847—1931) ________ the world-leading inventor for sixty years

I _______ my homework while my father______TV last night.

She was ________ mayor of the city for what she had done for the public.

Could you lend me your MP5___is broken.— Sure, here you are.

Various efforts over the centuries _________ topredict earthquakes to reduce the damage