(
A
)16. When did George Stephenson start to work?
A. In 1789.
B. In 1781.
C. In 1791.
(
C
)17. What did George Stephenson often do on holidays?
A. He learned English.
B. He worked with his father.
C. He studied engines.
(
A
)18. What did George Stephenson do when he was seventeen?
A. He began to learn English.
B. He became his father's helper.
C. He wrote his own name for the first time.
(
B
)19. How long did George Stephenson work every day?
A. For 8 hours.
B. For 12 hours.
C. For 13 hours.
(
C
)20. What was the greatest invention that George Stephenson had invented?
A. The plane.
B. The car.
C. The train.
答案：16.A 17.C 18.A 19.B 20.C
請看下面的情景提示：
你認(rèn)為居里夫人是歷史上最偉大的人,因為她兩次獲得諾貝爾獎,還推動了X射線在醫(yī)院的應(yīng)用?
(1)
Marie Curie.
(2)
Twice.
答案：(1)Marie Curie.
(2)Twice.
