为了忘记她，他全身心投入工作。

Trying to forget about her, he ___plunged ___into his work.

对于她来说，解决办法就是抛开一切，投入到与她的印度爱人的新生活中。

The solution for her is then to leave everything and ___plunge ___into a new life with her Indian lover.

宣布之后，她以坚定的奉献精神投入到新倡议中。

After the announcement, she ___plunged ___into the new initiative with unwavering dedication.