两把刷子liang ba shua zi

【口语】tricks of the trade

• offer
• office
• official
• often
• oil
• okay，OK
• old
• omit
• on
• on
• once
• one
• one
• one
• one
• oneself
• only
• only
• only
• onto(亦on to)
• onwards
• open
• opening
• operate
• operation