1. had no idea why cannot understand or come up with any reasons
Eg. He had no idea why he scored such low marks in the maths test.
2. a real hassle
troublesome, annoying or irritating
Eg. Getting a visa for the trip was a real hassle.
3. first-come, first-served basis
This phrase refers to a policy under which the requests of customers or clients are attended to in the order that they arrived, without any bias or preference
Eg. The tickets for the show will be distributed on a first-come, first-served basis.
Do you have an English club at your school?
What kind of activities does it offer? Which activity do you like most?