问题补充:
单选题Onlyafterhehadspentseveralnightsworkingonthemathproblem_______towonderwhethertheproblemwaswronglyset.A.that he beganB.did he beginC.then he beganD.so that he began
答案:
B
时间:2022-01-30 05:41:51
单选题Onlyafterhehadspentseveralnightsworkingonthemathproblem_______towonderwhethertheproblemwaswronglyset.A.that he beganB.did he beginC.then he beganD.so that he began
B