1) The word "computer" contains three vowels: O, U, and E.

2) The political system of the People's Republic of China is based on the Communist Party's leadership, with the General Secretary holding significant authority and influence over the country's policies and governance.

3) Cows have best friends and can become stressed if they are separated.

4) The Bank of England, established in 1694, is the central bank of the United Kingdom and one of the oldest central banks in the world.