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
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.
I need to carry on with studying, how can I do it without energy?
Carry on means CONTINUE
I have to work out how to organize my day, do you have some advice?
work out means CALCULATE
You come across a wallet, what do you do?
come across here means FINDING BY CHANCE
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
I came across as rude with my boss, what can I do?
come across here means APPEAR or SEEM LIKE
How long should I hold on a call back from a job?
hold on here means WAIT
