.Many people don’t know that_____.

• A、twins understand each other very well

• B、twins are slow to learn to talk

• C、twins are unlikely to do less well at school than other children

• D、there exists more communication between twins

By training the editor in your head, the speakers are advised 

• A、to get themselves trained by a good editor

• B、to discuss problems with their husbands or wives

• C、to express themselves in long but simple sentences

• D、to make sure each sentence has only one meaning

60（）