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。
TheClarkshaven’tdecidedyetwhichhotel_____.
Joseph was very lucky____with his life ; he almost did not get out of the room.
_____ regular training in nursing, she could hardly cope with the work at first.
Mary tiptoed over and took the clock away because she hated to hear it___when shewas trying to go to sleep.
I never regretted _____ his offer, for it was not where my interest lay.
