He set up in business____his own and was very successful.
A、inC
「句意」他独自一人开始经商，并且做得很成功。
「难点」onone‘sown是个常用的介词词组，意为“独自”;ofone’sown表示“某人自己的(东西)”，如：Ihaveaflatofmyown.我自己有套房子。
Miss Green was（）$100 for driving after drinking.
Last March the __________ of a 19th century cargo ship was found by an underwater archaeological team.
I don’t like _____ bills but when I do get them I like _____ them promptly.
John's score on the test is the highest in the class ; （）he last night.
Under this____pressure some of the rocks even became liquid.
