1. [词根辨异]指出下列单词的词根的含义是① care或② to run：
current curious curricle currency
secure curator incur incuriosity
recur procure concurrence occur
2. [由此及彼]根据已知单词的词义推断出其同根词的词义。
① incurious a.不关心的→inaccurate a.
② incuriosity n.不关心的→inaccuracy n.
3. [同义相连]将左栏中的单词和右栏中相对应的词义连接起来。
① insecure a. faulty
② insecurity b. incorrectness
③ inaccurate c. unsafe
④ inaccuracy d. defencelessness
⑤ incuriority e. unconcern
4. [望文生义]根据已学的词根知识推测下列单词的词义。
① incurable a.
② incurability n.
5. [寻根问底]指出下列单词的词根并领会其词义的由来。
① curio n.古董，古玩；珍品
② curiosa n. [复] 珍品；稀有的书
③ procuration n.代理
④ procurator n.代理人
⑤ manicure n.修指甲
manicurist n.指甲修剪师（提示：man=hand）
⑥ pedicure n.足医；修脚指甲（提示：ped=foot）
⑦ sinecure n.挂名职务；闲职（提示：sine=without）
24. cycl [GK]=circle圆环
常用词cycle，bicycle和encyclopaedia中，含有词根cycl，它源于希腊名词kuklos，意为circle（圆环）。cycl多见于科技术语，一般只与希腊语源的词根或词缀相结合。
cycle [cycl=circle圆环；-e→“a circle of time running时间转了一圈”→] n. recurrent period;period of a thing completion循环；周期：the cycle of the seasons季节的循环
▽cyclic [cycl(e);-ic a.] a.周期的；循环的
bicycle [bi-=two二；cycl=circle圆环；-e→“two circles两个圆轮”→] I n. two-wheeled vehicle两轮脚踏车，自行车→Ⅱv. ride on a bicycle骑自行车：to bicycle to school骑自行车上学
▽bicyclist [bicycl (e);-ist n.] n.骑自行车的人
unicycle [un=one 一；-i-; cycl=circle 圆环；-e→“one-circled vehicle一个轮的车”→] n. one-wheeled vehicle used by acrobats（杂技演员用的）独轮车
autocycle [auto-=automatic自动；cycle=bicycle脚踏车→] n. automatic bicycle, or bicycle with auxiliary engine机器脚踏车
encyclopaedia [en-=in在……之内；cycl=circle圆圈→all directions or fields各方面；-o-;paedia（与pacideia“教育”混淆）=education教育→“book giving education or knowledge in all fields 提供各方面知识的书”→] n. work containing information on all branches of knowledge百科全书：Encyclopaedia Britannica《大不列颠百科全书》
▽encyclopaedic [encyclopaed(ia);-ic a.] a.百科全书（式）的
encyclopaedism [encyclopaed(ia);-ism n.] n.知识渊博
encyclopaedist [encyclopaed(i);-ist n.] n.百科全书编篡者
cyclone [cycl=cicle圆；-one n.=thing, wind物，风→“wind in a circle圆环状的风”→] n. wind whirling around a low barometric center旋风，气旋（围绕低气压中心旋转的风）
▽cyclonic [cyclon(e);-ic a.] a.气旋的
hemicycle [hemi=half半；cycl=circle圆；-e→“half circle半个圆”→] n. semicircular figure半圆形
tetracycline [tetra=four 四；cycl=circle, ring 环；-ine n.=medicine药→] n. medicine of four-ring compounds in which carbon atoms are linked with other atoms四环素
