Unluckily, a car accident _____ on this road last week.

Look at these collections. They are all   stamps.

Why are you so late?— I was in half the way when it ________to me that I had left my notebook home, so I had to fetch it.

It is good manners to ____ the elder. [ ]

A Wechat(微信) is an invention ______ can help people talk to friends , share photos, ideas and feelings freely.