When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals

_______ brave Zhang Hua is!—Yes. He helped his neighbour, Mrs. Sun out of the fire.

下列各句中,没有语病的一项是(　　)

______ you eat the correct foods ______ be able to keep fit and stay healthy.

Do you often talk with your friends on thetelephone or mobile phone —. I like using QQ.