All _________, we sat down to enjoy _______ we thought the most delicious dinner.

A．finished, what                                           B．finishing, that

C．finish, what                                                D．finished, that

All finished, we sat down to enjoy ________ we thought the most delicious dinner.

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All finished, we sat down to enjoy ________ we thought the most delicious dinner.

[　　]

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All finished, we sat down to enjoy _________ we thought was the most delicious dinner.

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All finished, we sat down to enjoy _________ we thought was the most delicious dinner.