单项选择题

A. A chemistry class.
B. A biology class.
C. A mathematics class.
D. A physics class.
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单项选择题
A. Alice is now in a very bad temper. B. Alice is now preparing for the test. C. Alice is now very happy. D. Alice is now ill.
A. Alice is now in a very bad temper.
B. Alice is now preparing for the test.
C. Alice is now very happy.
D. Alice is now ill.
单项选择题
Mark Twain planned to earned a large sum of money by（）

A. becoming a printer’s apprentice
B. becoming a a river-boat pilot
C. working as a printer
D. collecting and selling cocoa
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