单选题 10.  I didn't know anything about any of the books so my choice was quite ______.
【正确答案】 A
【答案解析】 A.arbitrary adj. 任意的,武断的;B.obvious adj. 明显的,显然的;C.evident adj. 明显的,显然的;D.fortunate adj. 幸运的。该题意思是我对于这些书一无所知,所以我的选择是武断的。