______elasmosaur,______giant prehistoric sea reptile with fierce-looking jaws and flippers, had______muscular neck that accounte

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问题 ______elasmosaur,______giant prehistoric sea reptile with fierce-looking jaws and flippers, had______muscular neck that accounted for more than half its length.

选项 A、The.../...a
B、The...a...a
C、a.../...a
D、The...a.../

答案B

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