14、Dinosaurs have completely died out on the earth, never        again.

A．to be seen              B．being seen          C．seen             D．having been seen

14、A

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科目：高中英語 來源： 題型：

Dinosaurs have completely died out on the earth, never        again.

A．to be seen              B．being seen          C．seen             D．having been seen

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科目：高中英語 來源： 題型：

Dinosaurs have completely died out on the earth，never _______ again．

A．to be seen                                 B．being seen

C．seen                                                  D．having been seen

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