品句填词
Old______(记忆)are often called up when you hear a particular song or a piece of music.
When in class，our mind must pay attention to what the teacher says and not________(走神)．
We all hope the holidays will be________(延长)for another two days.
He________(假装)as if he didn't know about the thing at all.
We held a________(庆典)after our team won.
The wallet stolen yesterday was found________(隐藏)in the dustbin outside the building.
If you don't like it，I'll________(交换)with you.
The workers packed the glasses and________(标上)on each box “This Side UP”．
Like other children，I'm curious to find out the________(起源)of human kind.
You have________(弄混)the meanings of the two words.