消化食物和吸收营养物质的主要场所是( )A.口腔 B.胃 C.小肠 D.大肠 答案:C3.听下面一段材料.回答第15和16小题15.What's hard for Tom in English learning?A.Listening and reading.B.Writing and speaking.C.Listening and speaking.16.What is the woman's advice?A.Finding some pen friends.B.Reading English magazines.C.Joining their English club.