_陕西成考网

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

31（）

• A、lastly

• B、finally

• C、especially

• D、fortunately

书面表达

以“Failure and Success”为题写一篇短文，内容包括：

(1)人生中遭遇失败很常见;

(2)每个人都渴望成功;

(3)失败是走向成功的必经之路。