摘要： he stayed in the country, he collected a lot of folk tales. A. As B. While C. Because D. Since
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________ he stayed in the country, he collected a lot of folk tales.
[ ]
A．As
B．While
C．Because
D．Since
________ he stayed in the country, he collected a lot of folk tales.
[ ]
A．As
B．While
C．Because
D．Since