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3. From her ____ ( 迷惑) expression on the face, I know she hasn’t got my idea.　 　　　　3.____________

2.When I greeted her on the way to work, she____(回應(yīng)) with a smile.　 　　　　　　　　2.____________

1.Race____ (隔離) lasted about two centuries in America until the last half of 20^th century.　 1.____________

6.deserted　 7.mental　 　　　　8.merchant 　　9.Biology　 　10.delivered

10.Letters ____ (郵遞) by air is much faster than those by train, but they cost more.　　　 　　　　10.____________

Keys:　 1.mercy 　2. entrance 　　　3. hesitation　 　4.national 　　5. attention

9. _____ (生物學(xué)) is the science of life and living things.　 　　　　　　　　　　　　　　　　9.____________

8. Mike , a foreign ______ (商人),came to our factory last week.　　　　 　　　　　　　　　　8.____________

7. Is the difference between manual (體力) and ______ (腦力) labor great in our country? 　　　　7.____________

6. He ____ (舍棄) his wife and children and went abroad.　　　　　　　 　　　　　　　　　　6.____________

5. The problems of the laid-off workers and re-employment has caught great social ____ (關(guān)注).　 　5.____________