Farmers in China began to use tractors ___cattle for farming work.

_____ some knowledge of cooking just by watching my mother doing it.

Making great efforts to struggle hard in your study，if ______，will possiblylead to your great success in the college entrance exam next year

Mary, along with her parents ________ Hainan for aweek and they will come back soon.

I’m going to buy a new car. Any advice, John—Well, it depends on _______. If money isn’t a problem, you can buy a BMW.