a. 不成功的

success/succeed/successful/successfully/unsuccessful/successor/excess/proceed/process/procedure/access/accessible
记忆：
1. 词根ced, ceed, cess, 含义是“行，让步”前缀suc 即sub的变体，下面，success [ sEk5ses ] 走在了下面，成功, Everyone is after success. But success belongs to those who use both his hands and brains.每个人都在追逐成功，但成功属于那些既动手又动脑的人。
2. succeed [ sEk5si:d] vi, 成功, 继...之后, 继任 注意: succeed in doing something. Finally we succeeded in getting to the top.最后我们成功地到达了顶峰。
3. successful [ sEk5sesful ] adj. 成功的 Many factors make a successful writer.多种因素造就了一名成功的作家。
4. successfully [sEk5sesfJlI] adv. 成功地 China has launched manned space travel successfully.中国已成功地进行了载人太空飞行。
5. unsuccessful [ 5QnsEk5sesful ] adj. 不成功的 The project turned out to be unsuccessful.那项工程结果并不成功。
6. successor [ sEk5sesE ] n.继承者, 接任者, 后续的事物 The successors of the films are not all successful. 电影的续集并非都成功。
7. ex- 表示“out”, excess [ ik5ses, 5ekses ] n. & v. 过度，超过 The noise is in excess of what we can stand.我们受不了那噪音。
8. pro- 表示“向前” proceed [ prE5si:d] To go forward or onward, especially after an interruption vi.进行, 继续下去, 发生 The speech contest proceeded. 演讲比赛继续。
9. process [ prE5ses] A series of actions, changes, or functions bringing about a result n. 过程, 作用, 方法 vt.加工, 处理 I’m afraid the process is too complicated for you.恐怕这种方法对你过于复杂。
10. procedure [ prE5si:dVE ] A manner of proceeding n.程序, 手续 Finishing the procedure, he felt too tired. 完成手续后，他感到太累。
11. access [ 5Akses ] ac-cess n. 通路, 访问, 入门 vt.存取, 接近 No access to the house is given to common civilians.普通人不许进那房子。
12. accessible [ Ek5sesEbl ] adj. 易接近的, 可到达的, 易受影响的, 可理解的 The palace is not accessible for us.那宫殿我们去不了。
另类阅读：
His first book was such a great success that he sold tens of thousands of copies successfully. He thought he could succeed in writing another successful book, however, the successor turned out to be unsuccessful.