I had no idea ----> I didn't know
I'll burst ----> I've overeaten
I'm about to ----> I plan to do
in a little while ----> soon
in a minute ----> quickly
in the dark ----> not understand
inconsiderate ----> thoughtless
instruction ----> direction
interruption ----> bothering
interview // resume ----> job
iron horse ----> train // locomotive // railroad
irresponsible ----> isn't careful with
isn't warm enough ----> too cold
It's one's fault. ----> Sb. be to blame.

jeans and T-shirt ----> casual dress
job ----> position

keep an eye on ----> watch
keep an eye out for ----> watch for
keep doing // carry on ----> continue
keep to oneself ----> not sociable

larger waist ----> gain weight
last time ----> previously
late ----> delay
late this afternoon ----> later on in the day
lay off // le sb. go ----> lose one's job
line/little/step/word by line/little/step/word ----> gradually // methodically // in a logical way // one step at a time
look for a room to rent ----> look for a real estate agency
look into ----> check // inspect
look on with ----> share
look over ----> dominated
look up to ----> respect // admire
look well ----> in excellent health
lost track of time ----> didn't realize what time it was
lovely ----> beautiful