_福建成考网

The author probably feels that twins’ problem 

• A、can not be solved because solution is very cruel

• B、can be solved because twins will be separated

• C、can not be solved unless the twins are forced to live in an ordinary environment

• D、can be solved if the adults communicate with them more often

The article does not say whether the scientists’ experiments with dogs have .

• A、benefited animals other than dogs

• B、served man

• C、helped other dogs

• D、contributed to medical knowledge

60（）