Let’s meet at the station.
She was at a conference.
The committee is to meet at the weekend.
He joined up at eighteen.(join up 参军)
What are you laughing at? (laugh at 嘲笑)
Let’s have a look at the picture. (have a look at 看一看)
My mother was surprised at the news.(be surprised at 吃惊)
He is good at mathematics.(be good at 擅长)
He is good at drawing.
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