to carbon copy someone on something – másolati példányt kapok közé felvenni valakit
to include additional recipients on an email message that is intended for, or directed to, another person. Often abbreviated as “cc.” 

to cover for someone – beállni/dolgozni valakit helyett
to do something in place of someone else 

to go all out for something/to do something – minden erejével azon van, hogy…
effort to get or do something

to know the ropes – érti a dolgát/ismeri a csínját-bínját valaminek
to understand or be familiar with the details or knowhow about a specific situation, task, job, or role.

sources: The Free Dictionary by Farlex; Merriam-Webster Dictionary

Most pedig egészítsétek ki a mondatokat a kifejezésekkel.

1. We must ­­_____ get the contract otherwise we go bankrupt.
2. We should rely on your husband because he _____ of marketing.
3. _____ the new girl _____ on this project, will you?
4. I’m working tomorrow because I’m _____ Tom, who’s on sick leave.
5. Please _____ me _____ that email to the boss.
   I want him to know I am following the situation.

keys/megoldások:
1. go all out to;
2. knows the ropes;
3. Bring – up to speed;
4. covering for;
5. carbon copy on