35．-How shall we do the scientific research? - , we’ll have to gather concerned informatio——青夏教育精英家教网——

35．-How shall we do the scientific research?

　　　 -________, we’ll have to gather concerned information as much as possible.

　　　 A．After all　　　　　　　 B．To begin with　　　 C．In other words　　 D．To be frank

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