ask someone out
中文含义：约会
适合话题：leisure time and relaxing
例句：
I will ask my best friend out to go shopping on weekends.
ask around
中文含义：到处打听
适合话题：travel
例句：
People used to ask around when they go to a new place.
back someone up
中文含义：支持
适合话题：friends and family
例句：
My wife backed me up over my decision to quit my job.
blow something up
中文含义：往…里面充气
适合话题：leisure time and relaxing
例句：
We have to blow 50 balloons up for the party.
call someone back
中文含义：回电话
适合话题：interviewing
例句：
I called the company back but the offices were closed for the weekend.
do something over
中文含义：重做
适合话题：study
例句：
My teacher wants me to do my essay over because she doesn't like my topic.
eat out
中文含义：出去吃
适合话题：friends
例句：
We would like to eat out when our friends come.