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:2024-02-20 10:06:36
单选题Onlyafterhehadspentseveralnightsworkingonthemathproblem_______towonderwhethertheproblemwaswronglyset.A.that he beganB.did he beginC.then he beganD.so that he began
B