do sth. which one has done before是什么意思？

• searches
• ultra
• volume
• vehicle
• PEGGING
• 队长的英文
• silver
• toxicity
• disappointed
• ticket
• 解决方案英文
• 分配英文
• 呼吁英语
• saturday
• prompt
• 流浪者英文
• amazing
• client
• giraffe
• banger
• 导师英文
• panicked
• 确认英文
• fiercely
• explore
• pear
• giraffe
• failure
• 抛弃英文
• 纪念品英语

• erased
• cloud
• 来源英语
• searches
• intermission
• predict
• emergency
• narrow
• scared
• maths
• candy
• repeat
• 方案英语
• brat
• rice
• passage
• profile
• juice
• begins
• mind
• tourist
• 领域英语
• bombarded
• front
• conflict
• dragon
• tomato
• bothering
• organizations
• modernize

• plenty of
• tourist attraction
• keep under control
• power boating
• tae kwon do
• martial art
• virtual reality
• thousands of
• be connected to
• soya bean
• be accused of
• in my opinion
• nameless
• amusement park
• TV presenter
• cut back on
• open the floor
• in the form of