问题
选择题
Silk ________ in _______ China.
A．produce, the southeast
B．is produced, southeast
C．is grown, southeast
D．is produced, the southeast of
答案
答案：D
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Silk ________ in _______ China.
A．produce, the southeast
B．is produced, southeast
C．is grown, southeast
D．is produced, the southeast of
答案：D