The project alongside with the experiment we had once devoted so much time__________ perfectly.
A.to work out
B.to working out
C.to worked out
D.has worked out
网友回答
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。