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¡¡¡¡18. I want to know when he _______ for New York tomorrow.

¡¡¡¡A. has left B. is leaving C. had left D. has been leaving

¡¡¡¡19. He_______ of how he can do more for the people.

¡¡¡¡A. had always thought B. is always thinking C.has always been thought D. thinking always

¡¡¡¡20. Forests _______ and burned at such a speed that they will disappear from the earth in the future.

¡¡¡¡A.cut B. are cut C. are being cut D. had been cut

¡¡¡¡1. Are ,flying,I am 2. Are sitting, 3.Is,talking 4. are plying 5. are,doing 6.am singing 7. is,mending 8. is mending 9.are plying 10.is cooking 11. are having 12. Is ,writing 13. are flying 14.is singing, 15. is swimming

¡¡¡¡1.C 2.B 3.C 4.A 5.A 6.B 7.D 8.A 9C 10.C 11.B 12.A 13.D 14.D 15.B 16.B 17.A 18.B 19.B 20.C