60（）

What’s the reason for twins to be at a disadvantage in their intellectual development?

• A、They can only understand their own private language

• B、They communicate with outsiders less than non-twins.

• C、There is little stimulation for them.

• D、Adults don’t like to talk with them.

Which of the statements is true?

• A、The stockholder can sell his stock to anywhere at any time.

• B、There were no stock exchange in England in the 1700’s.

• C、The price of stock is not stable.

• D、The stockbrokers do the transaction without charging for the stockholders.