Did you ever have someone’s name on the tip of your tongue and yet you were unable to recall it (1) this happens again, do no (2) to recall it. Do something (3) for a couple of minutes, (4) the name may come into your head. The name is there since you have met (5) person and his name. It (6) has to be dug out. The initial effort to recall (7) the mind for operation, but it is the subconscious (8) that go to work to dig up a (9) memory. Forcing yourself to recall (10) never helps because it doesn’t (11) your memory；it only tightens it. Students find the preparatory method help (12) examinations. They read over the questions (13) trying to answer any of them. (14) they answer first the ones (15) which they are most confident. Meanwhile, deeper mental activities in the subconscious mind are taking (16) ; work is being done on the (17) difficult questions. By the time the easier questions are answered, answers (18) the more difficult ones will usually begin to (19) into consciousness. It is often (20) a question of waiting for recall to come to the memory.
17（）
A.too
B.less
C.not
D.more
参考答案：D
解析：
[考点] 逻辑推理
这篇文章主要说潜意识可以帮人们处理一些一时难以回忆起来的东西，而空格前提到学生们回答了比较容易的问题，那么接下来应该是潜意识会去处理“比较困难的问题”，故答案应为D。此外，还可以根据前后呼应的原则，参考18空格后的the more difficult ones，也应选D。
[干扰项分析] A选项too difficult表示太难，根据逻辑推理，前面讲了容易的，接下来该比较难的，而非太难的，故此选项不符合题意，与下文也不呼应，由此B和C选项放在这里也不符合文意。