根据提示和上下文,用括号中单词的恰当形式填空。 1. I had to take this one. I had no other_______________. (choose) 2. These problems should be approached in a_______________ way. (science) 3. He visited Shanghai at the mayor's _______________.(invite) 4. He is good at reading but poor in _______________. (pronounce) 5. Everyone wants to succeed, but few are aware of the rugged road to _______________. (succeed) 6. When I came home, the children were fast _______________.(sleep) 7. This is the only _______________ medicine that will cure your illness. (effect) 8. The city suffered heavy_______________ in the tornado. (lose) 9. Most American Indians are still living in _______________.(poor) 10. She failed the examination, but the _______________didn't discourage her. (fail) 11. _______________, the flood didn't do much damage to the crops. (lucky) 12. The lecture went on and on; it was _______________.(bore) 13. Job opportunities are _______________ to college students in summer holidays. (avail) 14. The teacher assigned us a lot of homework, but we had no time for these _______________. (assign) 15. What have you been doing _______________? (recent)