单选题 If the test taker finds an item to which an answer is not known, it may be wise to leave it blank and go on with the test.
A. valuable B. advisable
C. considerable D. probable

【正确答案】 B
【答案解析】题目中的wise意为“明智的”。四个选项中只有B.advisable (意为“可取的,明智的”)与之意思相近。选项A.valuable意为“有价值的”;选项 C.considerable意为“大(或多)的,值得考虑的;相当可观的”;选项D.probable意为“可能的”。