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.
9（）
A.light
B.fresh
C.dim
D.dark
参考答案：C
解析：
[考点] 词汇搭配
由于空格前有不定冠词“a”修饰名词“memory”，故“memory”在句中的意思就不是“记忆，记忆力”，而是指“记忆中的人(或事)”。而且根据上文的意思，有些东西你想不起来的时候，潜意识可以帮你挖掘；那么可以推断这里应该是挖掘那些模糊的人或事。四个选项中符合上下文意思的只有dim。
[干扰项分析] A选项light，B选项fresh，均与题意相左，D选项dark表示黑暗、阴暗的一面，也不符合题意。