live up to 期待や責任に応える、主義などに従って恥じない行動をする
He has been the man to live up to his parents’ expectation for a long time.
come up to ～に達する、～のすぐ傍までやってくる、期待に沿う
The water came up to his waist when he had a bad flood after the typhoon.
catch up with ～に追いつく、後から調整する overtake
We cannot catch up with her any more.
You have to work hard to catch up with the math class.
drop in at 予告も無しにふらっと立ち寄る visit without schedule
Prof. Tanaka often drop in at my house to drink and talk to me.
stand up for （人や権利などを）擁護する、支持する defend
Our company will stands up for your projects.
give in to 人を叱りつける、やっつける submit to
I’ll surely give in to him soon to have my sister’s revenge.
make do with （不十分ながら）～で間に合わす manage with
There was nothing to eat in my storages, so I had to make do with instant noodles.
fill in for ～の代理を務める、穴埋めをする substitute for
She filled in for me while I was absent from school because of my flu.
keep up with （時代などに）負けずについていく、交際を続ける（頻出）
My grandpa kept up with the times and his foresights were wonderful.
make up for ～を補う compensate for
That troopers should make up for a shortage of ammo immediately.
come down with ～の病気にかかる
We all are so much worried by her illness which she came down with.
come down to 結局～に行きつく、～に帰着する（頻出）
It has come down with a single choice between to let it go or to go back.
fall short of ～に不足する（事態に陥る）
The result of doing research fell short of the expectations of the directors.