Theprojectalongsidewiththeexperimentwehadoncedevotedsom...

问题详情：

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

【回答】

C

知识点：非谓语动词

题型：选择题