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题目内容
（南阳师范学院-教育学-大学英语（四））
All of the plants now farmed on a large scale were developed from plants ____ wild.
(A) that once grow
(B) once they grow
(C) they once grew
(D) once grew
(A) that once grow
(B) once they grow
(C) they once grew
(D) once grew
参考答案