单选题 40.  I don't have any ______ plan for the weekend—I was thinking of spending some time with my family or perhaps getting together with some friends.
【正确答案】 C
【答案解析】 词义辨析。A项confident自信的，有信心的；B项conservative保守的，守旧的；C项concrete具体的，为正确选项。本句意思为“对于周末，我还没有具体的计划”。D项considerate考虑周到的，体贴的。