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1.After ten years of study in the USA, he became____(有經驗)at teaching English.

2.Don't be_____(泄氣),try again and you will succeed in time.

3.My office is on the_____(第十二)floor, right opposite to my boss.

4.As the storm drew nearer, black clouds were_____(聚集)over the sky.

5. Go to see your parents as often as possible if it is ____(方便)to you.

6. The building was purchased and           (占用) by its new owners last year.

7. He has formed the habit of getting up and going to bed early and does every thing __  _ (有規律).

8. All the walls of his room are          (裝飾) with pictures of pop stars.

9. The learners should know the          (背景) knowledge of the foreign language.

10.To her_____(失望),Mrs. Smith found her son didn't pass the exam.