_陕西成考网

59（）

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.

4.（）

• A、trouble

• B、soul

• C、double

• D、enough