单项选择题

A．Physics.
B．Mathematics.
C．Environmental science.
D．Life science.
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单项选择题
A．Japanese students study much harder than Columbian students.B．Columbian students score higher than Japanese students in math.C．Columbian students are more optimistic about their math skills.D．Japanese students have better conditions for study.
A．Japanese students study much harder than Columbian students.
B．Columbian students score higher than Japanese students in math.
C．Columbian students are more optimistic about their math skills.
D．Japanese students have better conditions for study.
单项选择题
A．He has a feeling of insecurity.B．He is missing his family.C．He lacks self-confidence.D．He feels ill.
A．He has a feeling of insecurity.
B．He is missing his family.
C．He lacks self-confidence.
D．He feels ill.
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