It is only in the last sixty years that any evidence that Loch Ness Monster might exist. A．there——青夏教育精英家教网——

20. It is only in the last sixty years that　　　　 any evidence that Loch Ness Monster might exist.

A．there has been　　　 B．there was　　　　　 C．it has been　　　　　　　 D．it had

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