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。
Underthis（）pressuresomeoftherocksevenbecameliquid.
John'sscoreonthetestisthehighestintheclass;he____lastnight.
Theteachers’union_________alawsuitagainstthedistrictcallingforrepairing“deplorable”schoolconditions.
The teachers’union _________ a lawsuit against the district calling for repairing “deplorable” school conditions.
Joseph was very lucky （）with his life ; he almost did not get out of the room.
