Exercises
1. Sound is ___ only within a limited distance.
2. The people on this globe is divided into groups according to __ and cultural differences.
3. The economists must study the ___ relationship between scarcity of goods and higher prices.
4. ___ behaviour should be seen as kind of mental disease.
5. The physician uses ___ to reduce the patients’ tension or anxiety.
1.audible
2.ethnic
3.causal
4.Addictive
5.tranquilizers
1. marijuana n dried leaves etc, of hemp, smoked in cigarettes as a drug大麻
2. evoke v to inspire or draw forth 引起，激起
The music evoked memories of her youth.
派生词汇：Evocative adj 引起回忆的，唤起感情的evocation n引起，唤起 evocable adj可换出的
3. undisturbed adj not disturbed or interfered with 不受干扰的，未受干扰的
The old man likes living an undisturbed life.
派生词汇：Disturbance n打扰;烦恼;混乱 disturber n 干扰者 disturbing adj 烦扰的 disturbingly 另人不安地
4. arable adj fitfor cultivation, as by plowing 可耕作的
There is no arable land.
n land fit to be cultivated 可耕地