单选题 All teachers can have a free__________of these books to see if they are good enough to be used in class.
【正确答案】 C
【答案解析】本题考查词义辨析。选项A为“问题”；选项B为“礼物”；选项C为“样品”；选项D为“利益”。根据句意，故选C。