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Ann ______ the house when I called her last night.
A. cleans B. was cleaning C. will clean D. is cleaning
B ¡¾½âÎö¡¿¾äÒ⣺×òÍíÎÒ¸ø°²´òµç»°Ê±£¬ËýÕýÔÚ´òɨ·¿¼ä¡£ÓÉwhen I called her last night¿ÉÖª£¬Ö÷¾äÓùýÈ¥µÄijһÖÖʱ̬£¬¸ù¾ÝÑ¡Ïî·ÖÎö£¬Ö»ÓÐBÊôÓÚ¹ýÈ¥µÄijһÖÖʱ̬¡£¹ÊÑ¡B¡£
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