A. Mary wasB. Mary has been

C. was MaryD. has Mary been

【答案】C

【解析】

考查倒装句。句意：她全神贯注地练瑜伽，没有注意到外面下着大雨。so……that……句型中的so 位于句首时，需用倒装，且根据下文从句谓语动词took可知应用一般过去时，故选C。