( )13.
( )14.
( )15.
C
( )14.
B
( )15.
B
答案：13. C；14. B；15. B
( )16. When did George Stephenson start to work?
( )17. What did George Stephenson often do on holidays?
( )18. What did George Stephenson do when he was seventeen?
( )19. How long did George Stephenson work every day?
( )20. What was the greatest invention that George Stephenson had invented?
A
( )17. What did George Stephenson often do on holidays?
C
( )18. What did George Stephenson do when he was seventeen?
A
( )19. How long did George Stephenson work every day?
B
( )20. What was the greatest invention that George Stephenson had invented?
C
答案：16.A 17.C 18.A 19.B 20.C
请看下面的情景提示:
你认为居里夫人是历史上最伟大的人,因为她两次获得诺贝尔奖,还推动了X射线在医院的应用。
(1)
(2)
你认为居里夫人是历史上最伟大的人,因为她两次获得诺贝尔奖,还推动了X射线在医院的应用。
(1)
Marie Curie.
(2)
Twice.
答案：.(1)Marie Curie.
(2)Twice.