单选题The project alongside wit

问题补充：

单选题Theprojectalongsidewiththeexperimentwehadoncedevotedsomuchtime__________perfectly.A.to work outB.to working outC.to worked outD.has worked out

答案：

C解析考查句子结构。主语为The project后面是一个定语从句alongside with the experiment we had once devoted so much time to，to后面缺少宾语故先行词experiment后省略了关系代词which/that，整句话中缺少谓语，根据语境用worked out即The project worked out perfectly.故选C。