FCE Use of English Part 1 (multiple choice cloze) often tests fixed expressions and idioms. The correct answer is often the only one that forms the right collocation or phrase.
on the other hand
introduces a contrasting point
in the long run
over a long period of time
take into account
consider a factor when deciding
make ends meet
earn just enough money to live on
keep up with
stay at the same pace as
come to terms with
accept something difficult