sir.It的精选

问题详情：--Whyistheclassroomsodirty?--Sorry，sir．It_______yesterday．Weforgottodoit．A．doesn'tclean                           B．didn'tcleanC．isn'tcleaned              ...

问题详情： --Whyistheclassroomsodirty?一Sorry,sir.It_______yesterday．Weforgottodoit．A．don'tclean B.didn'tclean   C.weren’tcleaned  D.wasn'tcleaned【回答】D    知识点：动词语态题型：选择题...