I came across as rude with my boss, what can I do?
come across here means APPEAR or SEEM LIKE
I have to work out how to organize my day, do you have some advice?
work out means CALCULATE
I need to carry on with studying, how can I do it without energy?
Carry on means CONTINUE
I skipped work yesterday, can you help me make up a believeable story?
make up means 2 things: inventing or creating a story and also when you have to sit to re-take an exam you did badly at.
You come across a wallet, what do you do?
come across here means FINDING BY CHANCE
You are in CHINA and you need to get to your school, how do you get across the message to your taxi driver?
get across means COMMUNICATE your message CLEARLY
you come across you friend's EX; he wants to talk to you, what do you do?
come across in this scenario means MEETING by chance
How long should I hold on a call back from a job?
hold on here means WAIT