1.No, technically I have six, and I'm mulling over a gum purchase, so I think you should go.
【句子翻譯】嚴格地說,我買了六瓶。我還在琢磨要不要買口香糖,所以你先吧。
【句子解析】mull over 認真琢磨;
He tried to mull things over in his mind.
他試圖在他的腦海中思索事情。
2.This is the most exciting thing that ever happened to me.
【句子翻譯】這竟是我有生以來最高興的事。
【句子解析】這是個包含定語從句的復合句,that引導的從句修飾thing,由于前面有最高級most修飾thing,所以后面要用that而不是which來引導;