单项选择题

A. She should drop the biochemistry class.
B. She should try harder.
C. He prefers to learn rocket science.
D. He can’t understand it either.
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单项选择题
A. 650 million dollars. B. 560 million dollars. C. 40 million dollars. D. 50 million dollars.
A. 650 million dollars.
B. 560 million dollars.
C. 40 million dollars.
D. 50 million dollars.
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