练习

　　1. private A vt. To set apart or cut off from others.

　　2. invade B adj. not being burdened by trouble, worry, or care; happy and carefree; be of

　　optimism; confident; cocksure

　　3. acknowledge C adj. Left to choice; not compulsory or automatic

　　4. calculate D v. To transgress; violate; To violate a rule or law

　　5. optimistic E vt. To ascertain by computation; reckon

　　6. optional F vt. To obtrude or force on another or others.

　　7. impose G v. To intervene or intrude in the affairs of others; meddle; To come

　　between so as to be a hindrance or an obstacle

　　8. offend H v. To admit the existence, reality, or truth of; To report the receipt of;

　　To express thanks or gratitude for

　　9. interfere I adj. Of or confined to the individual; personal

　　10. isolate J v. To enter by force in order to conquer or pillage; To encroach or

　　intrude on; violate

　　【Key】1. I 2. J 3. H 4. E 5. B 6. C 7. F 8. D 9. G 10. A