21.
Some of the tunnels in the cliff are natural, some were _______ out. 
(A) decorated
(B) penetrated
(C) pried
(D) carved
出自:郑州工程技术学院-大学英语(2).

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
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