单项选择题

A．By prediction.
B．By recording.
C．Through observation.
D．Through interviewing.
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单项选择题
A．To speak English.B．To read technical books in English.C．To listen to English programs on radio.D．To read English literature.
A．To speak English.
B．To read technical books in English.
C．To listen to English programs on radio.
D．To read English literature.
单项选择题
A．Take a break.B．Go to work.C．Do the other problems.D．Keep trying.
A．Take a break.
B．Go to work.
C．Do the other problems.
D．Keep trying.
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