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The factory was built in a secret place, around ______ high mountains.

A. which was   B. it was   C. which were    D. them were

The factory was built in a secret place, around _________ high mountains.

A. which was  B. it was       C. which were      D. them were

The factory was built in a secret place, around _________ high mountains.

    A. which was         B. it was         C. which were       D. them were

The factory was built in a secret place, around _________ high mountains.

    A. which was         B. it was         C. which were       D. them were