_福建成考网

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.

If the whole operation_____ before hand, a great deal of time and money would have been lost.

• A、was not planned

• B、has not been planned

• C、had not been planned

• D、were not planned