come up trumps

to come up trumps - do what you need to do to succeed

come up trumps

to come up trumps - a successful outcome, often unexpected

come up with

to come up with (something) - to have an idea or a plan

comfort zone

where you feel secure

Commentary Clangers

commit to

to commit to - a better word to use than 'can' for IELTS writing - determined

complex

a complex - a group of buildings dedicated to one purpose (shopping complex, hotel complex etc.)

compost

compost - a product used in gardening made from decayed plants and vegetables

Computer issues

concept

a concept - an idea or notion