Li Jianrou won China’s first gold medal _________ February 13, 2014 at the 2014 Sochi Winter Olympics in Russia. 
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A
at
B
by
C
in
D
on
推荐题目
This CD-ROM can help you learn and have fun ______.
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at times
B
on time
C
at the same time
D
in time
— Why did you go to London two years ago?— I went there with the aim of learning English.
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to practice speaking
B
improving
C
in order to learn
D
in order that learn
Don’t be late again. Please try your best to be here __________.
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A
in time
B
on time
C
at times
D
at all times