问题
选择题
All of the flowers now raised here have developed from those _____ in the forest. [ ]
A. once they grew
B. they grew once
C. they once grew
D. once grew
答案
答案：C
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All of the flowers now raised here have developed from those _____ in the forest. [ ]
A. once they grew
B. they grew once
C. they once grew
D. once grew
答案：C