6．-What to them? -They appeared in the accident. A. happened; to have been injured ——青夏教育精英家教网—

摘要：6．-What to them? -They appeared in the accident. A. happened; to have been injured B. had happened; to be injured C. happened; injured D. have happened; to be injured

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—What ________ to them?

— They appeared ________ in the accident.

[　　]

A．have happened, to be injured

B．happened, to have been injured

C．had happened, to be injured

D．happened, injured

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－What ________ to them?

－They appeared ________ in the accident.

[　　]

A．have happened; to be injured

B．happened; to have been injured

C．had happened; to be injured

D．happened; injured

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