A
主句是祈使句,条件状语从句由if引导.
devote to
1.把…用于:
She has devoted all her time to helping the sick.
她把所有时间用于照顾病人.
They must devote a lot of time to that project.
他们必须在那项计划上花大量的时间.
2.把…献给,专心致力于:
She has always devoted herself to her music.
她一向专心研究音乐.
I devote myself heart and soul to the arduous task.
我全心全意地致力于这项艰巨的任务.