听力原文:W: Bob must have caught the flu. He said he had a pain in iris heed and lost appetite for everything. He should see a doctor. M: If Mary can come back, he will be full of life. Love cannot be enforced. Q: What do you know about Bob from the conversation? (19) A.He has caught a cold. B.He will recover soon. C.He was enforced to see a doctor. D.He has fallen out of love.