From (such data) Wegener developed his floating continents theory. He envisioned an original super continent that crystallized(o

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问题 From (such data) Wegener developed his floating continents theory. He envisioned an original super continent that crystallized(of) molten material (making up) the infant earth, eventually the mass (cracked) and broke into several pieces—the present continents.

选项 A、such data
B、of
C、making up
D、cracked

答案B

解析 去掉。of。
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