重點講解：
1. point to
指向；朝向；
eg. You can go anywhere and still the compass points north or south.
無論走到哪里，羅盤仍然指向北或南。
eg. He controlled the car until it was pointing forwards again.
他穩住車子，直到它又朝前開去。
2. come upon
偶然碰到（或發現）；產生（某種態度或感覺）；
eg. I came upon an irresistible item at a yard sale.
在一次庭院拍賣會上，我偶然發現了一個忍不住想買的東西。
eg. A sense of impending doom came upon all of us.
我們所有人都有一種大難臨頭的感覺。
3. have sb. doing sth.
是指讓某人一直做某事，強調動作的持續性、連續性或者動作的反復性；
eg. He had us laughing during the lunchtime.
他讓我們在午飯期間一直笑個不停。
eg. You’d better have your car running slowly.
你最好把車子開慢點。
4. tell sb. to do sth.
叫；命令；吩咐；建議某人做某事；
eg. A passer-by told the driver to move his car so that it was not causing an obstruction.
一個過路人叫那個司機把他的車挪一挪，免得擋道。
eg. She told me on the telephone to come help clean the house.
她在電話里叫我過去幫忙打掃屋子。
5. haven't a clue
不知道；一無所知；
eg. I haven't a clue what I'll give Carl for his birthday next year.
我不知道明年卡爾過生日我該送什么。
eg. Children today haven't a clue about nature.
今天的孩子對自然沒有一點印象。